Dear Doctors, I have had excessive production of sebum (seborrhea) from my nose pores since I was 16 years old. Since 5 years ago I get seborrheic dermatitis on my nose. My dermatologist prescribed 40mg/day Isotretinoin to treat the seborrhea - I weigh 80kg I read about low dose regimes of 2.5mg per day to control seborrhea but it is long term treatment. For seborrhea would 40mg/day and reaching target 120mg/kg dosage have more chance of permanent sebum reduction than the low dose regime?