I'm 16 and i suffer from acne and i'm suggested to use benzoyl peroxid, doxycycline, isotretinoin, n vitamin-e, so i'm askin if there'd b sideaffects.

Yes: Acne is a chronic disease that's a grave personal and professional liability. It is well worth the likelihood of side effects. If topical benzoyl peroxide isn't a bit unpleasant, consider increasing the strength / frequency until it is. This plus tetracycline may be enough for moderate acne. Isotretinoin is brutal but hugely effective; talk with your physician at length about it.