Does lactulose expire?

Yes. Lactulose has an expiration date like other medicines. Do not use it after the date printed on the bottle or label.

Practical tips:
- Storage: Keep unopened bottles at room temperature (away from heat and moisture).
- After opening: Many brands advise discarding the bottle after about 30 days, but check the package insert or label for the exact guidance on your product.
- Check for changes: If the liquid looks discolored, cloudy, has an unusual odor, or obvious separation, discard it regardless of the date.
- If in doubt, ask a pharmacist or your prescriber.

If you want, tell me the exact label text or expiration date and I’ll help interpret it.