Not all medications are available at community pharmacies. Some drugs are only available online. But what site can you trust in such a sensitive matter?
I recommend visiting an online service that has been offering quality medicines at reasonable prices for more than 10 years. Even drugs for delicate diseases (or as the Germans call them potenzmittel) are available in the range. The assortment of the site is replenished almost every month, and the delivery takes only 1-2 weeks.