I can understand your concern for pimples
on your face. Acne
or pimples are youth related problem and is not a disease per say.
A gel containing clindamycin
phosphate 1.2% w/w and tretinoin gel can be very helpful to you for long term. The only precaution you should follow is to apply the cream in very thin layer and that too over affected area only.
In your kind of acne the best treatment is by isotretinoin
capsules under strict dermatological supervision only.
Take a proper guidance and follow up with a good dermatologist
so that all the problem of acne can be dealt best for future time.