HI, I am 17 years old boy, I do get frequent pimples on my face but now all of a sudden I have got 7 pimples at a time which seems to be continuing one after the other. Last years my dermatologist had prescribed me erythromycin500 and clindamycin topical which were very effective then, but now when I have taken 2 doses of it but it does not seem to work anymore but is further ruining my face with more pimples. So doctors if you could suggest some oral or topical medications.