Should sublingual nitroglycerin (SL NTG) be discarded 6 months after being opened

Should sublingual nitroglycerin (SL NTG) be discarded 6 months after being opened?

Many of us were taught that SL NTG (Nitrostat) tabs are easily degraded...and to recommend replacing them every 6 months.

But there's good evidence that SL NTG stays potent right up until the expiration date on the bottle...even if it's been opened.

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