Ask your doctor to prescribe generic drugs. Generics are an excellent way to save money on prescriptions, and they are as effective as brand name drugs for most conditions.
Another way to save is to shop around. Pharmacies charge very different prices for the same drugs. The New York State Attorney General's office has a site that allows you to search local drugstores for the prices they charge for many common prescriptions.
You can also look online, as many large online drugstores offer very low prices for mail order prescriptions. Here are a couple of websites to look at: Drugstore.com and Costco.com.