Depends on where you go I take 1 at bedtime to keep my nasal passages open so my CPAP system works for me 96 tabs last me 3 mo. 1 place will only sells me 1 - 24ct. and I have to go thru 5 minutes of signing, showing ID's and such. Another place will give me 96, 3 mo, I show my DL, sign and done