: You must wait until enough time has passed so that your total purchases over the last 30 days (including the one you want to make now) do not exceed 9 grams. This is a "rolling" 30-day window, not a fixed calendar month. How Much Pseudoephedrine is in Claritin-D?
The number of pills you can buy depends on the specific strength, as the limits are based on the weight of the pseudoephedrine, not the number of boxes. Claritin-D® Tablets 24 Hour
You can buy (or any product containing pseudoephedrine) again as soon as you are within the legal purchase limits established by the Combat Methamphetamine Epidemic Act of 2005 . Federal Purchase Limits
Because pharmacies use electronic tracking systems like the , the system will automatically block a sale (a "stop sale alert") if your new purchase would put you over these limits based on your ID. When Can You Specifically Buy More?
: You can typically buy more the following calendar day , provided you haven't reached your monthly limit.
: You cannot buy more than 3.6 grams of pseudoephedrine base in a single day, regardless of the number of transactions.
