You might shop around. I get mine at Costco. Just double checked what I last paid. As of one month ago, my cost was $9.02 for a 90 day supply. This is their retail price, without any insurance discount.I used to get 90 day supply, without insurance, for about $10. Now, with insurance, it's more like $25 -- still not a lot compared to dollars per pill for the newer stuff.
Also, you can ask them to check the GoodRx price. It takes them just a few seconds to look it up and they will honor their price if it is less than the price you would otherwise pay.