Isotretinoin how much?

Dosing for isotretinoin is personalized and must be set by a dermatologist. Here are the general guidelines:

- Typical starting dose: about 0.5 to 1 mg/kg per day, taken in divided doses with a high-fat meal.
- If needed, the dose can be increased up to around 1–2 mg/kg per day, but higher doses come with more side effects.
- Treatment duration: usually 15–20 weeks, but some courses are longer. The goal is a total (cumulative) dose of about 120–150 mg/kg over the course of therapy.
- How this translates to pills: tablets come in various strengths (common ones are 10–40 mg). For example, a person weighing 70 kg might start around 35–70 mg per day, depending on the exact dose used.

Important safety notes:
- Isotretinoin is highly teratogenic. In many countries, females of childbearing potential must use two forms of contraception and undergo regular pregnancy testing (often via a controlled program like iPLEDGE in the U.S.).
- Regular monitoring is needed (liver function tests, lipid levels, etc., and watching for mood changes or severe side effects).
- Do not use vitamin A supplements in addition to isotretinoin unless your doctor says it’s okay.
- Avoid certain antibiotics (like tetracyclines) during treatment unless your clinician specifies otherwise.

If you want a rough example tailored to you, tell me:
- your weight
- gender/childbearing potential
- whether you’re already on isotretinoin or just asking in general

I can then give a more specific ballpark dose range. But remember, only your prescriber can determine and adjust the exact dose.