Oral isotretinoin is a very useful oral medication for treating severe acne, especially associated with scarring.
In your case, your doctor has started you on a relatively lower dose regimen of oral isotretinoin 10mg on alternate days. If this dosing regimen is working well for you in reducing acne relapses, then there is probably no need to use a higher dose regimen.
In fact, with a higher dose, there will be more expected side effects eg dryness on the skin, lips and eyes which can be quite uncomfortable for some patients.
Please also bear in mind that oral isotretinoin must never be taken by females who are pregnant or who are contemplating to get pregnant, as there is potential serious adverse side effects to the developing foetus.
So I would recommend you to speak to an experienced doctor in treating acne with oral isotretinoin to assess your condition and advise you further to optimise your dosing regimen.
Hope this helps!
Cheer!
Dr David Ng C H