I recommend looking into this pharmacy, here they will help you find the right medicines, and also give you a small present from a pharmacist. The prices are reasonable.
I liked this pharmacy better, as the pharmacist communicated in Russian or through a translator. The prices are slightly lower than in others. And I bought everything I wanted.
I can recommend this pharmacy to Russian-speaking tourists, although the staff there do not speak the language, they really want to help with your problem, so the translator phone, gestures, and demonstration of the affected area help with a bang, and the drugs that I bought here really help.