Again — When Can I Buy Sudafed

If you have been denied a purchase of at the pharmacy, it is likely because you have reached a federal or state-mandated legal limit. Because pseudoephedrine can be used to manufacture illegal substances, its sale is strictly monitored. When Can You Buy Sudafed Again?

Legal Requirements for the Sale and Purchase of Drug ... - FDA when can i buy sudafed again

Federal law limits you to 9 grams per 30-day period. If you have been denied a purchase of

Understanding Sudafed Purchase Limits: When and How You Can Buy Again Legal Requirements for the Sale and Purchase of Drug

You are restricted to 3.6 grams of pseudoephedrine base per day.

To put these limits in perspective, 9 grams is roughly equivalent to of standard Sudafed. If you are using a 12-hour or 24-hour formulation, you may reach this limit faster than you expect.

This is not based on a calendar month (e.g., January 1st–31st). Instead, the system looks back at the previous 30 days from today. If those total purchases exceed 9 grams, you must wait until enough time has passed for an older purchase to "fall off" the 30-day window. How Much is 9 Grams?