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Accutane Cumulative Dose Calculator
Isotretinoin dosage tracker — track your progress toward optimal 150-220 mg/kg target
⚕️ Medical Disclaimer: This calculator provides educational estimates only. Always follow your dermatologist's prescribed dosing plan. Individual treatment varies based on response, side effects, and clinical judgment.
💊 Accutane® (isotretinoin) cumulative dose tracking • US standard dosing (mg/kg)
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Current cumulative dose (mg/kg)
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Total isotretinoin taken
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To reach minimum target
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Est. months remaining*
Progress to target range
Target: 150-220 mg/kg
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150 mg/kg
220 mg/kg
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Track your Accutane cumulative dose progress toward 150-220 mg/kg target range
What is Accutane (Isotretinoin) Cumulative Dose?
Accutane® (isotretinoin) is a powerful oral retinoid used to treat severe, treatment-resistant acne. The cumulative dose — total milligrams taken per kilogram of body weight over the entire treatment course — is the key metric dermatologists use to reduce relapse risk and achieve long-term clearance.
⚠️ Important Safety Information
Isotretinoin has significant potential side effects including:
- Pregnancy risk: MUST NOT be used during pregnancy — causes severe birth defects. Requires monthly pregnancy tests and iPLEDGE enrollment for women of childbearing age.
- Dryness: Lips, skin, eyes, nose — use moisturizers, lip balm, and artificial tears
- Mood changes: Rare but serious — report depression, irritability, or suicidal thoughts immediately
- Lab monitoring: Regular blood tests for liver enzymes, cholesterol, and triglycerides required
- Sun sensitivity: Avoid tanning; use SPF 30+ sunscreen daily
Take with a fatty meal (avocado, nuts, olive oil) for optimal absorption. Avoid alcohol during treatment.
How to Use This Calculator
- Enter your weight — in kg or lbs (converts automatically)
- Enter your daily dose — typically 0.5-1.5 mg/kg/day as prescribed
- Enter days completed — how many days you've taken the medication
- Select target range — standard, conservative, or aggressive treatment goals
- Results show: current cumulative dose (mg/kg), total mg taken, progress to target, estimated months remaining
What is the Optimal Cumulative Dose?
- Standard range: 150-220 mg/kg — supported by clinical research for best outcomes with lowest relapse rates
- Minimum effective: 120-150 mg/kg — some patients achieve clearance with lower doses
- Higher doses: 220-250 mg/kg — may be used for severe or resistant cases under specialist supervision
- Treatment duration: Typically 4-8 months depending on daily dose and target cumulative dose
How Cumulative Dose is Calculated
Formula: Cumulative dose (mg/kg) = (Daily dose × Days completed) ÷ Weight (kg)
Example: 70kg patient taking 40mg daily for 30 days:
(40mg × 30 days) ÷ 70kg = 1,200 ÷ 70 = 17.1 mg/kg (only 8-12% of target range)
Treatment Phases
- Initial phase (0-20% of target): Starting dose, often 0.5 mg/kg/day. Monitor for initial flare.
- Maintenance phase (20-80%): Dose increased to 0.8-1.2 mg/kg/day. Side effects managed.
- Completion phase (80-100%): Reaching target cumulative dose. Dose may be tapered.
- Post-treatment: Clear skin maintained; some patients need second course if relapse occurs.
Frequently Asked Questions
- How long does Accutane take to work? — Improvement usually seen in 1-2 months; full results after completing cumulative dose (4-8 months).
- What if I miss a dose? — Skip the missed dose; never double up. Continue next day as prescribed.
- Can I take a lower dose for longer? — Some providers use low-dose extended protocols (0.3-0.5 mg/kg/day for 12+ months). Consult your dermatologist.
- What is the iPLEDGE program? — Required risk management program in the US for isotretinoin to prevent pregnancy during treatment.
- How accurate is this calculator? — Provides educational estimates only. Your dermatologist determines final cumulative dose based on clinical response and side effects.