Thank you for your question. Accutane (isotretinoin) dosing is based on an individual's weight, which is 1 mg per kilogram and for a minimum of 4 months. Therefore, since you weigh 110 kg, then your minimum recommend total dose will be isotretinoin 110 mg per day for four months. But if you can only tolerate 60 mg daily due to side effects or lab abnormalities, then your therapy will be extended to at least 8 months. If your therapy is less than the recommend dosing, then acne returning is a higher possibility, which sounds like what happened with you. I highly recommend you consult with a board certified dermatologist regarding your acne and to discuss treatment options that best suit your needs. Take care and good luck.