Does walgreens have a medication that clear a affection for UTI? How much is it?

Cranberry tabs. Some utis resolve without antibiotics. Drink lots of fluids you may also take cranberry juice or tablets. You may also take bladder analgesics like azo. Price differs depending on brand.
Possibly. Generally if a UTI is truly present, one would do better using an antibiotic. The use of otc products such as cranberry juice or water can be helpful there are other meds that can be used as well that relax the bladder discomfort. Good idea to get a urine culture to verify the infection and the use of the antibiotic.