How long is medicine still effective after expiration date?

Answer:
Depends on the form of the medicine and also of the substance. Many medicines keep part of their pharmacological properties during a certain period of time after expiration date, but as none can tell for sure how long the medicine is still effective, the best choice is to purchase a new one. Psychological effects can make the medicine not effective if you don't trust it. (Jim west70)
First answer by ID1426876493. Last edit by Jim west70. Contributor trust: 84 [recommend contributor recommended]. Question popularity: 33 [recommend question].