If it's covered under insurance then it's $5-$30 (depending on policy) for a co-pay and that's it. If it's not covered under your policy then it's eleventy bajillion dollars. The insurance will also pull stupid shit like not letting you pick up your refill early, or making you get some other medication that is similar, but not what your doctor prescribed. Of course the insurance company doesn't pay eleventy bajillion dollars, they've negotiated it down to 50¢, but that's what you'll pay if you don't have insurance.