31. But without such cards, elderly people could obtain the drug for less than $ 37 at some retail pharmacies . 32. Diplomat also serves as the specialty pharmacy for many retail pharmacies , hospitals and health systems throughout the United States. 33. There are just slightly over 1, 800 independent pharmacies operating as the only retail pharmacy within their rural community. 34. Unichem is one of the two largest pharmaceutical wholesalers in England and owns a chain of 400 retail pharmacies . 35. Telepharmacy services can be delivered at retail pharmacy sites or through hospitals, nursing homes, or other medical care facilities. 36. The average wholesale cost is about US $ 0.15 per defined daily dose ( retail pharmacies normally charge more ). 37. In general, a single dose of Viagra costs about $ 10 at retail pharmacies , although some are charging considerably more. 38. Aetna, for example, might offer a Medicare drug plan, dispensing medications at discounted prices through retail pharmacies around the country. 39. Phentermine / topiramate ER is available in certified retail pharmacies nationwide and also available through a certified mail-order pharmacy network. 40. These products are typically not available via other distribution channels ( such as retail pharmacies ) due to FDA restrictions.