If you still have a local non-chain pharmacy use them until they go out of business. They will eventually because the chains have a stranglehold on pricing and are actively raising costs for independents, then offering to buy the business as it founders.
Mark Cuban's Cost Plus drugs is my refuge from pharmacies. It's cheaper than the chains even if you have insurance, but I can't be my Adderall through them.
You can, but people rarely do more than once, which should be an indication of how much fun it is.