Thread: Do powders change over time.

Storage can be a problem with nitroglycerin tablets used under the tongue for angina - the volatile nitroglycerin content of the tablets migrated, so tablets and bottom and top had different potency, meaning a poor shelf life. Nowadays it is less of a problem with nitroglycerin tablets as they are individually blister packed.

If you have a double base powder (which contains nitroglycerin), consider shaking it up to ensure it's well mixed so the powder at top and bottom has uniform nitroglycerin content.