Peptide Dosage Calculator for Weight Loss

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Peptide Dosage Calculator for Weight Loss

Calculate optimal peptide dosages for your weight loss journey with precision.

Peptide Dosage Calculator

Semaglutide (e.g., Ozempic, Wegovy) Tirzepatide (e.g., Mounjaro, Zepbound) Ipamorelin / CJC-1295 DAC Tesamorelin
Enter weight in kilograms (kg).
Consult your physician for recommended weekly dosage.
Once per week Twice per week Three times per week Once per day
Concentration of the peptide solution in the vial.
Total volume of your insulin syringe.

Your Peptide Dosage Results

N/A

Total Weekly Dose

N/A mg

Dose Per Injection

N/A mg

Volume Per Injection

N/A mL

Calculation Logic:

Weekly Dose (mg) = Patient Weight (kg) * Recommended Dose per kg (mg/kg/week) OR Desired Dose (mg/week) based on peptide type. Dose Per Injection (mg) = Weekly Dose (mg) / Number of Injections per week. Volume Per Injection (mL) = Dose Per Injection (mg) / Peptide Concentration (mg/mL). *Note: Recommended mg/kg/week varies significantly by peptide. This calculator uses typical starting points or user-defined weekly doses for specific peptides.*

Key Assumptions:

– Calculations are based on general guidelines and typical therapeutic ranges. – is assumed to be used at a target weekly dose or based on weight. – Standard pharmaceutical-grade peptides and calibrated syringes are used. – Individual metabolic rates and responses can vary, necessitating physician consultation.

Weekly Dosage Trend

Visualizing the total weekly dosage based on varying patient weights.
Weight (kg) Target Weekly Dose (mg) Dose Per Injection (mg) Volume Per Injection (mL)

What is Peptide Dosage for Weight Loss?

Peptide dosage for weight loss refers to the specific amounts of therapeutic peptides prescribed and administered to individuals aiming to achieve significant weight reduction. These peptides are short chains of amino acids that act as signaling molecules in the body, influencing various biological processes. In the context of weight loss, they can help regulate appetite, boost metabolism, improve insulin sensitivity, and promote fat breakdown.

Who should use it: Individuals struggling with obesity, metabolic syndrome, or those who have not achieved desired results with traditional diet and exercise may be candidates for peptide therapy under medical supervision. It's crucial for a qualified healthcare provider to assess suitability based on individual health status, medical history, and specific weight loss goals.

Common misconceptions: A prevalent misconception is that peptides are a magic bullet for effortless weight loss. While they can be powerful tools, they work best when integrated into a comprehensive lifestyle approach that includes a balanced diet and regular physical activity. Another misconception is that all peptides are the same; efficacy and dosage depend heavily on the specific peptide used, its mechanism of action, and individual patient factors. Furthermore, the unregulated online market can lead to confusion regarding purity, dosage, and safety.

Understanding the correct peptide dosage for weight loss is paramount for both efficacy and safety. This specialized form of therapy leverages the body's natural signaling pathways to support fat loss and metabolic health.

Peptide Dosage for Weight Loss Formula and Mathematical Explanation

The calculation of peptide dosage for weight loss is not a one-size-fits-all formula. It depends heavily on the specific peptide being used, its approved or studied therapeutic range, and individual patient characteristics like weight, metabolism, and treatment goals. However, a general framework often involves weight-based dosing or fixed dosing protocols.

General Weight-Based Dosing (Example for some peptides):

A common starting point for some weight loss peptides is to dose based on milligrams per kilogram of body weight per week.

Formula: Weekly Target Dose (mg/week) = Patient Weight (kg) × Recommended Dose Factor (mg/kg/week)

Once the Weekly Target Dose is established, it's divided based on the injection frequency.

Formula: Dose Per Injection (mg) = Weekly Target Dose (mg/week) / Number of Injections per Week

To administer the Dose Per Injection, we use the concentration of the peptide solution.

Formula: Volume Per Injection (mL) = Dose Per Injection (mg) / Peptide Vial Concentration (mg/mL)

Fixed Dosing Protocols (Common for GIP/GLP-1 agonists):

For peptides like Semaglutide and Tirzepatide, established protocols often dictate dose escalation over several weeks or months, rather than purely weight-based calculations after initial titration. The calculator provides a way to understand the weekly target dose and how to inject it.

Variable Explanations:

  • Patient Weight (kg): The total body mass of the individual.
  • Recommended Dose Factor (mg/kg/week): A specific ratio determined by clinical studies for a particular peptide, indicating the safe and effective amount per kilogram of body weight per week. This is highly peptide-specific.
  • Weekly Target Dose (mg/week): The total amount of the peptide intended for administration over a seven-day period.
  • Number of Injections per Week: How often the peptide is administered within the week (e.g., once, twice, daily).
  • Dose Per Injection (mg): The calculated amount of peptide to be injected in a single administration.
  • Peptide Vial Concentration (mg/mL): The amount of active peptide present in each milliliter of the solution in the vial.
  • Volume Per Injection (mL): The precise volume of the solution to be drawn into the syringe for each injection.

Variables Table:

Variable Meaning Unit Typical Range / Notes
Patient Weight Body mass of the individual kg Varies greatly; e.g., 50-200+ kg
Recommended Dose Factor Peptide's mg/kg/week ratio mg/kg/week Highly peptide-specific (e.g., 0.01 – 0.2 mg/kg/week, or fixed protocols)
Weekly Target Dose Total peptide for 7 days mg/week Varies based on peptide and individual response
Number of Injections Frequency of administration N/A 1, 2, 3, 7 (daily)
Dose Per Injection Peptide amount per shot mg Calculated value
Peptide Vial Concentration Active peptide in solution mg/mL e.g., 2 mg/mL, 5 mg/mL, 10 mg/mL
Volume Per Injection Syringe volume for dose mL Calculated value, typically < 1 mL for insulin syringes

Accurate calculation of peptide dosage for weight loss relies on precise inputs and understanding the specific peptide's protocol.

Practical Examples (Real-World Use Cases)

Let's illustrate the use of the peptide dosage for weight loss calculator with practical scenarios.

Example 1: Semaglutide for a Patient with Obesity

Scenario: Sarah is 35 years old, weighs 95 kg, and her physician has prescribed Semaglutide (Wegovy protocol) for weight loss. The target maintenance dose is typically 2.4 mg per week, administered once weekly. Her Semaglutide vial has a concentration of 5 mg/mL. She uses a 1 mL insulin syringe.

Calculator Inputs:

  • Peptide Type: Semaglutide (or similar GLP-1 agonist)
  • Patient Weight: 95 kg
  • Desired Dose (mg/week): 2.4 mg
  • Injection Frequency: 1 (Once per week)
  • Peptide Vial Concentration: 5 mg/mL
  • Syringe Size: 1 mL

Calculator Outputs:

  • Primary Result: Volume Per Injection: 0.48 mL
  • Total Weekly Dose: 2.4 mg
  • Dose Per Injection: 2.4 mg
  • Volume Per Injection: 0.48 mL

Interpretation: Sarah needs to inject 0.48 mL of the 5 mg/mL Semaglutide solution once a week. This volume contains the target dose of 2.4 mg. This ensures consistent delivery of the prescribed medication for her weight loss plan.

Example 2: Tesamorelin for Visceral Fat Reduction

Scenario: John is 50 years old, weighs 110 kg, and has been prescribed Tesamorelin for reduction of visceral abdominal fat, a common issue in individuals with HIV-associated lipodystrophy. His doctor recommends a dose of 2 mg administered subcutaneously three times per week. The Tesamorelin comes in a vial reconstituted to a concentration of 2 mg/mL. He uses a 1 mL syringe.

Calculator Inputs:

  • Peptide Type: Tesamorelin
  • Patient Weight: 110 kg (Note: Tesamorelin is often fixed dose, so weight might be less critical here, but we'll use it to illustrate potential calculations if a weight-based protocol were used. The calculator will default to the specified "Desired Dose" if applicable or use a weight-based proxy if not.)
  • Desired Dose (mg/week): (Calculated based on 2mg * 3 times/week = 6mg/week)
  • Injection Frequency: 3 (Three times per week)
  • Peptide Vial Concentration: 2 mg/mL
  • Syringe Size: 1 mL

Calculator Outputs (Based on 2mg per injection):

  • Primary Result: Volume Per Injection: 1.00 mL
  • Total Weekly Dose: 6.0 mg (2mg * 3)
  • Dose Per Injection: 2.0 mg
  • Volume Per Injection: 1.00 mL

Interpretation: John must inject 1.00 mL of the reconstituted Tesamorelin solution three times per week. Each injection delivers the prescribed 2 mg of Tesamorelin. This precise measurement is vital for achieving the therapeutic goal of reducing visceral fat.

These examples highlight how the peptide dosage for weight loss calculator aids in converting prescribed dosages into practical, measurable injection volumes, ensuring adherence to treatment plans.

How to Use This Peptide Dosage Calculator for Weight Loss

Our Peptide Dosage Calculator for Weight Loss is designed for simplicity and accuracy, helping you understand the practical aspects of your peptide therapy. Follow these steps for optimal results:

  1. Select Peptide Type:

    Choose your specific peptide from the dropdown menu (e.g., Semaglutide, Tirzepatide, Tesamorelin). This selection may adjust default parameters or calculation logic based on common protocols.

  2. Enter Patient Weight:

    Input your current weight in kilograms (kg). For some peptides, this is a critical factor in determining the dosage.

  3. Specify Desired Weekly Dose (If Applicable):

    For peptides with established fixed doses or protocols (like Semaglutide maintenance), enter the target milligram dose per week as prescribed by your healthcare provider. If your peptide is purely weight-based and you have a recommended mg/kg/week factor, you might need to calculate the total weekly dose externally first, or use a more advanced calculator if available.

  4. Set Injection Frequency:

    Select how many times per week you will be injecting the peptide (e.g., once, twice, daily).

  5. Input Vial Concentration:

    Enter the concentration of your peptide vial in milligrams per milliliter (mg/mL). This is crucial information usually found on the vial or accompanying documentation.

  6. Enter Syringe Size:

    Specify the total volume of the syringe you are using (typically 1 mL for insulin syringes).

  7. Calculate:

    Click the "Calculate Dosage" button. The calculator will immediately process your inputs.

How to Read Results:

  • Primary Highlighted Result: This is typically the "Volume Per Injection (mL)". It tells you the exact amount of liquid to draw into your syringe for each dose. Accuracy here is paramount.
  • Intermediate Values:
    • Total Weekly Dose: The total amount of peptide you will administer throughout the week.
    • Dose Per Injection: The calculated milligram amount of peptide in each individual injection.
    • Volume Per Injection: The liquid volume corresponding to the 'Dose Per Injection', measured in mL.
  • Assumptions: Review the key assumptions to understand the basis of the calculations.
  • Chart and Table: These provide a visual and tabular representation of how dosage might scale or be applied, offering further context.

Decision-Making Guidance:

This calculator is a tool to aid understanding and preparation, NOT a substitute for professional medical advice. Always follow your healthcare provider's specific instructions regarding dosage, administration, and frequency. Use the calculated volumes as a guide for preparing your injections. If the calculated volume exceeds the capacity of your syringe or seems unusually large or small, consult your doctor immediately. The goal of understanding peptide dosage for weight loss is to empower patients with knowledge while ensuring safety and efficacy under expert guidance.

Key Factors That Affect Peptide Dosage for Weight Loss Results

Several critical factors influence the effectiveness and appropriate dosage of peptides used for weight loss. Understanding these can help optimize treatment and manage expectations.

1. Specific Peptide Type and Mechanism of Action

Different peptides target distinct pathways. GLP-1 agonists (Semaglutide, Tirzepatide) mimic satiety hormones, slow gastric emptying, and improve insulin sensitivity. GHRH analogs (CJC-1295, Tesamorelin) can influence lipolysis and metabolism. The intrinsic potency and target action of each peptide dictate its effective dosage range and administration schedule. Using the correct peptide dosage for weight loss is fundamental.

2. Patient's Body Weight and Composition

Many peptide dosages are weight-based (mg/kg). Heavier individuals may require higher absolute doses to achieve a similar physiological effect compared to lighter individuals. Body composition (muscle mass vs. fat mass) can also play a role, although less directly calculated.

3. Individual Metabolism and Genetics

People metabolize substances differently due to genetic variations, gut health, and overall physiological state. Some individuals may process a peptide faster or slower, requiring dosage adjustments to maintain therapeutic levels or avoid side effects. This is a significant reason why fixed protocols might need personalization.

4. Purity and Concentration of the Peptide

The actual peptide dosage for weight loss delivered depends on the purity of the active ingredient and the concentration (mg/mL) of the solution. Using poorly characterized or inaccurately concentrated peptides poses significant risks and can lead to under-dosing or over-dosing. Always source from reputable compounding pharmacies.

5. Injection Site and Technique

Subcutaneous injections are common, but absorption rates can vary slightly depending on the injection site (abdomen, thigh, arm). Proper injection technique ensures the peptide is delivered correctly into the subcutaneous fat layer, maximizing bioavailability.

6. Patient Adherence and Lifestyle Factors

Peptides are most effective when combined with a healthy lifestyle. Poor adherence to the prescribed dosing schedule, inconsistent administration, or neglecting diet and exercise can significantly impair weight loss results, making the calculated peptide dosage for weight loss seem ineffective.

7. Presence of Underlying Health Conditions

Conditions like kidney disease, liver issues, or diabetes can affect how the body processes peptides and may necessitate lower starting doses or careful monitoring. For instance, severe kidney impairment might require dose adjustments for GLP-1 receptor agonists.

8. Hormonal Balance and Other Medications

Overall hormonal status and interactions with other medications can influence treatment outcomes. For example, peptides that affect insulin sensitivity should be used cautiously in individuals already on diabetes medications.

Careful consideration of these factors is essential for optimizing the efficacy and safety of peptide therapy for weight loss.

Frequently Asked Questions (FAQ)

  • Q1: Is this calculator a substitute for medical advice?

    No. This peptide dosage calculator for weight loss is a tool to help understand dosage calculations based on provided inputs. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or a qualified healthcare provider for any questions regarding your medical condition or treatment plan.

  • Q2: What is the typical starting dose for Semaglutide for weight loss?

    For Semaglutide (like Wegovy), the typical starting dose is usually 0.25 mg once weekly, gradually increasing over several weeks to a maintenance dose of up to 2.4 mg per week, as determined by your healthcare provider. This calculator can help determine the volume for these doses if you input the vial concentration.

  • Q3: How do I calculate the volume if my vial concentration is different?

    Use the formula: Volume Per Injection (mL) = Dose Per Injection (mg) / Peptide Vial Concentration (mg/mL). For example, if your dose is 1 mg and the concentration is 2 mg/mL, you would inject 0.5 mL.

  • Q4: Can I use this calculator for any peptide?

    This calculator is designed for common weight loss peptides like Semaglutide, Tirzepatide, Tesamorelin, and combinations like Ipamorelin/CJC-1295. However, dosage protocols vary widely. Always verify the specific recommended dosage and units with your healthcare provider.

  • Q5: What are the risks of incorrect peptide dosage?

    Incorrect dosage can lead to insufficient results (under-dosing) or adverse side effects (over-dosing). Side effects can range from gastrointestinal issues (nausea, diarrhea) to more serious metabolic or hormonal disruptions. Precision in measuring the peptide dosage for weight loss is crucial.

  • Q6: How often should I inject my peptide for weight loss?

    This depends entirely on the peptide prescribed. GLP-1 agonists like Semaglutide are typically administered once weekly. Other peptides might be daily or several times a week. Always follow your doctor's instructions precisely.

  • Q7: What if the calculated volume is very small (e.g., 0.05 mL)?

    Very small volumes can be difficult to measure accurately with standard insulin syringes. If your calculation results in a volume that is hard to draw precisely, consult your healthcare provider. They may recommend a different concentration vial or adjust the dosing schedule.

  • Q8: Does weight training affect my peptide dosage?

    While weight training is crucial for preserving muscle mass during weight loss and improving metabolic health, it doesn't directly alter the prescribed peptide dosage itself. However, it complements the effects of peptides by improving body composition and overall health outcomes. Ensure your overall health plan is discussed with your doctor.

Disclaimer: This calculator and content are for informational purposes only and do not constitute medical advice. Always consult with a qualified healthcare professional before making any decisions about your health or treatment.

var chart = null; var initialChartData = []; function updateCalculator() { var peptideType = document.getElementById("peptideType").value; var patientWeightKg = parseFloat(document.getElementById("patientWeightKg").value); var dosePerWeekInput = document.getElementById("dosePerWeek"); var dosePerWeek = parseFloat(dosePerWeekInput.value); var injectionFrequency = parseFloat(document.getElementById("injectionFrequency").value); var peptideConcentration = parseFloat(document.getElementById("peptideConcentration").value); var injectionVolume = parseFloat(document.getElementById("injectionVolume").value); // Show/hide relevant fields based on peptide type var dosePerWeekGroup = document.getElementById("dosePerWeekGroup"); var peptideConcentrationGroup = document.getElementById("peptideConcentrationGroup"); var injectionVolumeGroup = document.getElementById("injectionVolumeGroup"); dosePerWeekInput.removeAttribute("disabled"); document.getElementById("dosePerWeek").style.backgroundColor = "#ffffff"; // Reset background document.getElementById("patientWeightKg").style.backgroundColor = "#ffffff"; // Reset background if (peptideType === "semaglutide" || peptideType === "tirzepatide") { dosePerWeekGroup.style.display = "flex"; peptideConcentrationGroup.style.display = "flex"; injectionVolumeGroup.style.display = "flex"; } else if (peptideType === "ipamorelin_cjc1295") { dosePerWeekGroup.style.display = "flex"; // Often dosed in mcg, but can be mg for simplicity in calculator peptideConcentrationGroup.style.display = "flex"; injectionVolumeGroup.style.display = "flex"; } else if (peptideType === "tesamorelin") { dosePerWeekGroup.style.display = "flex"; // Tesamorelin is typically fixed dose per injection, calculator will use this as target peptideConcentrationGroup.style.display = "flex"; injectionVolumeGroup.style.display = "flex"; } else { dosePerWeekGroup.style.display = "none"; peptideConcentrationGroup.style.display = "flex"; // Default to showing if not specifically hidden injectionVolumeGroup.style.display = "flex"; // Default to showing } // Set assumption text var assumptionPeptideTypeElement = document.getElementById("assumptionPeptideType"); if (peptideType === "semaglutide") assumptionPeptideTypeElement.textContent = "Semaglutide"; else if (peptideType === "tirzepatide") assumptionPeptideTypeElement.textContent = "Tirzepatide"; else if (peptideType === "ipamorelin_cjc1295") assumptionPeptideTypeElement.textContent = "Ipamorelin / CJC-1295"; else if (peptideType === "tesamorelin") assumptionPeptideTypeElement.textContent = "Tesamorelin"; else assumptionPeptideTypeElement.textContent = "the selected peptide"; // Clear previous errors clearErrors(); // Placeholder for validation before calculation if needed, actual validation happens in calculateDosage } function calculateDosage() { var peptideType = document.getElementById("peptideType").value; var patientWeightKg = parseFloat(document.getElementById("patientWeightKg").value); var dosePerWeekInput = document.getElementById("dosePerWeek"); var dosePerWeek = parseFloat(dosePerWeekInput.value); var injectionFrequency = parseFloat(document.getElementById("injectionFrequency").value); var peptideConcentration = parseFloat(document.getElementById("peptideConcentration").value); var injectionVolumeInput = document.getElementById("injectionVolume"); var injectionVolume = parseFloat(injectionVolumeInput.value); // This is syringe size, not calculated volume per injection var weeklyDose = 0; var dosePerInjection = 0; var calculatedVolumePerInjection = 0; var primaryResultUnit = ""; // — Input Validation — var isValid = true; if (isNaN(patientWeightKg) || patientWeightKg <= 0) { document.getElementById("patientWeightKgError").textContent = "Please enter a valid weight (kg)."; isValid = false; } else { document.getElementById("patientWeightKgError").textContent = ""; } // Validate dosePerWeek only if the group is visible if (dosePerWeekInput.offsetParent !== null) { if (isNaN(dosePerWeek) || dosePerWeek <= 0) { document.getElementById("dosePerWeekError").textContent = "Please enter a valid dose."; isValid = false; } else { document.getElementById("dosePerWeekError").textContent = ""; } } if (isNaN(peptideConcentration) || peptideConcentration <= 0) { document.getElementById("peptideConcentrationError").textContent = "Please enter a valid concentration."; isValid = false; } else { document.getElementById("peptideConcentrationError").textContent = ""; } if (isNaN(injectionVolume) || injectionVolume 0) { calculatedVolumePerInjection = dosePerInjection / peptideConcentration; } else { calculatedVolumePerInjection = NaN; // Avoid division by zero } } else if (peptideType === "ipamorelin_cjc1295") { // Example: Ipamorelin/CJC-1295 often dosed in mcg. Let's assume user inputs mg/week for consistency. // If user inputs 10mg/week, dosePerInjection = 10mg / frequency weeklyDose = dosePerWeek; dosePerInjection = weeklyDose / injectionFrequency; primaryResultUnit = "mL"; if (peptideConcentration > 0) { calculatedVolumePerInjection = dosePerInjection / peptideConcentration; } else { calculatedVolumePerInjection = NaN; } } else if (peptideType === "tesamorelin") { // Tesamorelin is often a fixed dose per injection (e.g., 2mg). // We will use the dosePerWeek input as the target DOSE PER INJECTION for Tesamorelin. // This requires user to input the *per injection* dose and multiply by frequency mentally if needed, or calculator calculates weekly based on it. // Let's clarify calculator's intent: dosePerWeek input acts as target DOSE PER INJECTION for Tesamorelin for simplicity. dosePerInjection = dosePerWeek; // User inputs the mg per injection dose here weeklyDose = dosePerInjection * injectionFrequency; primaryResultUnit = "mL"; if (peptideConcentration > 0) { calculatedVolumePerInjection = dosePerInjection / peptideConcentration; } else { calculatedVolumePerInjection = NaN; } } else { // Default or generic calculation if peptide type is unknown or requires weight-based // Fallback to a general weight-based approach if no specific protocol is set // This part might need refinement based on common weight-based peptides // For now, let's assume a default mg/kg/week if peptide type is not specified for calculation // Let's use a hypothetical mg/kg/week for demonstration if user inputs it // For this simplified calculator, we'll rely on user's 'dosePerWeek' input for most cases. // If no specific logic, let's make it clear. weeklyDose = dosePerWeek; // Assume user input is weekly dose dosePerInjection = weeklyDose / injectionFrequency; primaryResultUnit = "mL"; if (peptideConcentration > 0) { calculatedVolumePerInjection = dosePerInjection / peptideConcentration; } else { calculatedVolumePerInjection = NaN; } } // — Display Results — var primaryResultElement = document.getElementById("primary-result-value"); var primaryResultUnitElement = document.getElementById("primary-result-unit"); if (!isNaN(calculatedVolumePerInjection) && calculatedVolumePerInjection > 0) { primaryResultElement.textContent = calculatedVolumePerInjection.toFixed(2); primaryResultUnitElement.textContent = primaryResultUnit; document.getElementById("weeklyDose").textContent = weeklyDose.toFixed(2); document.getElementById("dosePerInjection").textContent = dosePerInjection.toFixed(2); document.getElementById("volumePerInjection").textContent = calculatedVolumePerInjection.toFixed(2); // Highlight primary result if it's valid document.getElementById("primary-result").style.backgroundColor = "#28a745"; // Success color } else { primaryResultElement.textContent = "N/A"; primaryResultUnitElement.textContent = ""; document.getElementById("weeklyDose").textContent = "N/A"; document.getElementById("dosePerInjection").textContent = "N/A"; document.getElementById("volumePerInjection").textContent = "N/A"; document.getElementById("primary-result").style.backgroundColor = "var(–warning-color)"; // Warning color if invalid } // Update chart and table updateChartAndTable(); } function clearErrors() { document.getElementById("patientWeightKgError").textContent = ""; document.getElementById("dosePerWeekError").textContent = ""; document.getElementById("peptideConcentrationError").textContent = ""; document.getElementById("injectionVolumeError").textContent = ""; document.getElementById("peptideTypeError").textContent = ""; document.getElementById("injectionFrequencyError").textContent = ""; } function resetForm() { document.getElementById("peptideType").value = "semaglutide"; document.getElementById("patientWeightKg").value = "75"; document.getElementById("dosePerWeek").value = "1.0"; // Default weekly dose example document.getElementById("injectionFrequency").value = "1"; document.getElementById("peptideConcentration").value = "5"; // Default concentration example document.getElementById("injectionVolume").value = "1"; // Default syringe size clearErrors(); updateCalculator(); // Update UI and calculations based on reset values calculateDosage(); // Trigger calculation after UI update } function copyResults() { var primaryResultValue = document.getElementById("primary-result-value").textContent; var primaryResultUnit = document.getElementById("primary-result-unit").textContent; var weeklyDose = document.getElementById("weeklyDose").textContent; var dosePerInjection = document.getElementById("dosePerInjection").textContent; var volumePerInjection = document.getElementById("volumePerInjection").textContent; var peptideType = document.getElementById("peptideType").options[document.getElementById("peptideType").selectedIndex].text; var assumptionPeptideType = document.getElementById("assumptionPeptideType").textContent; var assumptionsText = "Key Assumptions:\n- Peptide Type: " + assumptionPeptideType + "\n- Calculations are based on general guidelines.\n- Individual responses may vary."; var resultsText = "Peptide Dosage Calculator Results:\n"; resultsText += "——————————–\n"; resultsText += "Primary Result (Volume Per Injection): " + primaryResultValue + " " + primaryResultUnit + "\n"; resultsText += "Total Weekly Dose: " + weeklyDose + " mg\n"; resultsText += "Dose Per Injection: " + dosePerInjection + " mg\n"; resultsText += "Volume Per Injection: " + volumePerInjection + " mL\n"; resultsText += "\n" + assumptionsText; try { navigator.clipboard.writeText(resultsText).then(function() { alert("Results copied to clipboard!"); }, function(err) { console.error('Async: Could not copy text: ', err); prompt("Copy this text manually:", resultsText); }); } catch (e) { console.error('Error copying text: ', e); prompt("Copy this text manually:", resultsText); } } // — Charting — function updateChartAndTable() { var ctx = document.getElementById('dosageChart').getContext('2d'); var tbody = document.getElementById('chartDataTableBody'); var peptideType = document.getElementById("peptideType").value; var baseWeight = parseFloat(document.getElementById("patientWeightKg").value); var baseDosePerWeek = parseFloat(document.getElementById("dosePerWeek").value); var baseConcentration = parseFloat(document.getElementById("peptideConcentration").value); var baseInjectionFrequency = parseFloat(document.getElementById("injectionFrequency").value); tbody.innerHTML = "; // Clear existing table rows initialChartData = []; // Clear previous data var weights = []; var targetWeeklyDoses = []; var dosePerInjections = []; var volumePerInjections = []; // Generate data for chart (e.g., for weights from 50kg to 150kg) for (var w = 50; w 0) { currentVolumePerInjection = currentDosePerInjection / baseConcentration; } else { currentVolumePerInjection = NaN; } // Only add valid data points to chart and table if (!isNaN(currentWeeklyDose) && !isNaN(currentDosePerInjection) && !isNaN(currentVolumePerInjection)) { weights.push(w); targetWeeklyDoses.push(currentWeeklyDose); dosePerInjections.push(currentDosePerInjection); volumePerInjections.push(currentVolumePerInjection); // Add row to table var row = tbody.insertRow(); row.innerHTML = '' + w + ' kg' + '' + currentWeeklyDose.toFixed(2) + ' mg' + '' + currentDosePerInjection.toFixed(2) + ' mg' + '' + currentVolumePerInjection.toFixed(2) + ' mL'; } } initialChartData = { weights: weights, targetWeeklyDoses: targetWeeklyDoses, dosePerInjections: dosePerInjections, volumePerInjections: volumePerInjections }; if (chart) { chart.destroy(); // Destroy previous chart instance } chart = new Chart(ctx, { type: 'line', data: { labels: initialChartData.weights, datasets: [ { label: 'Total Weekly Dose (mg)', data: initialChartData.targetWeeklyDoses, borderColor: 'rgb(75, 192, 192)', backgroundColor: 'rgba(75, 192, 192, 0.2)', fill: true, tension: 0.1 }, { label: 'Volume Per Injection (mL)', data: initialChartData.volumePerInjections, borderColor: 'rgb(255, 99, 132)', backgroundColor: 'rgba(255, 99, 132, 0.2)', fill: true, tension: 0.1 } ] }, options: { responsive: true, maintainAspectRatio: false, scales: { x: { title: { display: true, text: 'Patient Weight (kg)' } }, y: { title: { display: true, text: 'Value' }, beginAtZero: true } }, plugins: { tooltip: { mode: 'index', intersect: false, }, legend: { position: 'top', } }, interaction: { mode: 'nearest', axis: 'x', intersect: false } } }); } // Initial calculation and chart update on page load document.addEventListener("DOMContentLoaded", function() { updateCalculator(); calculateDosage(); // Ensure initial calculation runs updateChartAndTable(); // Ensure initial chart is drawn }); // Helper function to add Chart.js dynamically if not already present function addChartJs() { if (!document.querySelector('script[src*="chart.min.js"]')) { var script = document.createElement('script'); script.src = 'https://cdn.jsdelivr.net/npm/chart.js@4.4.1/dist/chart.umd.min.js'; script.onload = function() { console.log("Chart.js loaded."); // Call updateChartAndTable again after Chart.js is loaded updateChartAndTable(); }; document.head.appendChild(script); } else { // If Chart.js is already loaded, ensure the chart is updated updateChartAndTable(); } } // Call addChartJs on DOMContentLoaded to ensure Chart.js is available before trying to draw document.addEventListener("DOMContentLoaded", addChartJs);

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