In order to maintain proper storage conditions, which of the following medications must be dispensed...

Nitroglycerin sublingual tablets are light- and moisture-sensitive, requiring storage in tight, light-resistant containers. Removing them from their original glass container can compromise potency. Therefore, they must always be dispensed in the original container provided by the manufacturer.

According to USP Packaging and Storage Requirements and Mosby’s Pharmacy Technician:

“Nitroglycerin SL tablets lose potency quickly when exposed to air or light. Do not repackage; dispense only in manufacturer-supplied container.”

Other options do not require original container for stability:

Methotrexate – may be repackaged

Metoprolol XL – stable in unit-dose or amber vials

Allopurinol – routine packaging allowed