Hello Chia,
Prescription of Roaccutane (Isotretinoin) is based on your weight. The target dose in the treatment of inflammed acne (especially severe, pus filled acne) is 120mg/kg.
While it is tempting to stop isotretinoin use once your acne has cleared up, hitting this target dose will reduce the chance of a relapse in future.
For example if you are 60kg, you will need to completed 7200mg of isotretinoin. Depending on the dose that you are taking daily, the treatment duration will vary.
Most patients are able to tolerate a dose of 20-30mg/day. We will titrate the dose according to the side effects that you experience. It is also good practice to monitor your blood cholesterol and liver function test as there are rare instances that these parameters may be affected with treatment.
Hope this answers your question
