The best bet is to call your pharmacy and inquire about expiration. Call a couple to compare answers.
Do you still have it?
I would do a web search re: the efficacy timeline for the drug. Many drugs last for decades with the only issue being loss of potency. Some drugs however, could deteriorate into toxic ingredients. The military did a study on some antibiotics in their supply chain and found them still effective and safe 20 years later. Do some research before you decide.
- Phentermine Information for Consumers
- Phentermine Information for Healthcare Professionals (includes dosage details)
- Side Effects of Phentermine (detailed)
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