days supply

If I have a script of 90 Tramadol and the sig says "take one every 6 hours" how many days supply is that? I'm coming up to like 22. Am I right?

Answer: The patient can take a maximum of 4 tablets a day (24 hours in a day, divided by 6 = 4). Divide 90 by 4 and you get 22 days. Yes, you are right. Thanks for your question!