Nystatin expiration?

The expiration date of a nystatin product isn’t something I can tell you for a specific bottle, but here’s how it generally works:

| Item | Typical Information |
|------|---------------------|
| Where to find it | The expiration (“Best By” or “Use By”) date is printed on the bottle or box—usually on the side or the bottom of the label. |
| Typical shelf‑life | For most liquid and ointment forms of nystatin, manufacturers typically recommend a shelf life of 2–5 years from the date of manufacture. |
| What the date means | After that date the medication’s potency, safety, or efficacy may no longer be guaranteed. Using a product past its expiration can lead to reduced effectiveness or, in rare cases, irritation or other adverse reactions. |
| When to replace | If you’re unsure whether the product is still within its shelf life, check the label. If the date has passed, it’s safest to replace it with a new bottle. |
| Storage conditions | Keep the medication in a cool, dry place, away from direct sunlight and moisture—this helps maintain its stability up to the labeled expiration date. |

Bottom line: Always check the label on the specific bottle you have. If the expiration date has passed, it’s best to get a new supply rather than risk diminished efficacy or safety.