What is the expiration date after opening a bottle of Nitroglycerin?

After opening a bottle of nitroglycerin, it is generally recommended to use it within 3 to 6 months, as the medication can degrade over time, especially when exposed to air and moisture. Always check the specific expiration date provided by the manufacturer on the packaging, and store the medication in a cool, dry place away from light. If you notice any changes in color, consistency, or if the medication has a strange odor, it should not be used. Always consult your pharmacist or healthcare provider for specific guidance.