I have metoprolol from 2012 for pvcs. they are expired. safe to take?

Yes but don't: At worst the pills may have lost some potency. However, there is not good medical reason to use a beta blocker for PVC's. The extra beats are harmless unless you have underlying weakness of the heart or previous heart attack. In those cases, a person should take a beta blocker drug every day. Otherwise, I'd urge you not to use the med which has no benefit in simple PVC's.

Not safe: Expired meds are not safe to take in general.