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are due to collection of fatty secretions and bacterial infection and formation of comedones.
You should not use these drugs you have allergy
Best method is to wash the face with lukewarm water and soap(you can use medicated soaps like-savlon/dettol
) but not the face wash and other very soft preparation.
You should dry the face by wiping it with thick cotton towel, rub with pressure so that any retained greasy content get expelled from the skin pores.
Then apply the cream Benzoyl peroxide(Pernox/Persol 2.5% gel) twice a day for 45days.
If you have any further query please let me know I would try to answer it for you.
Wish you a great health!