Enoxaparin isn't something you want to fool around with - if it's expired, get a new injection because it won't work effectively. That's what expired means.
Yes medical research has shown that Zantac (Ranitidine) is still effective up to 1.5 years after expiration date. After that it begins to lose some of its potency. Like canned food with expiration dates as long as the package is sealed and properly stored it lasts well beyond the expiration date.
Expiration dates mean the date that the drug is full-strength. After that date, it's no longer as effective. You can take it, but it probably won't work well.
A gamca is not good after 3 months. This is a condom.
6 months after date of issuance
I am assuming that by "facet injections" you mean hydrocortisone injections at the site of spinal facets for pain relief. I still get them about every 6 months or so. I have a combination of osteoarthritis and degenerative disc disease and the injections do help manage my pain.
Lupron injections usually last about 3 months, and 2 injections are usually given in sequence for endometriosis treatment. You will likely not have a period for at least 6 months, and sometimes it can take a few months to become regular after the medication has left your system.
Medicine should never be taken after the expiration date. The bottle the medicine came in should have the expiration date printed on the label. As drugs age, they become less effective, and if the pills have been stored in a cool, dark, dry place they may last longer. But, eighteen months is really a long time, even at that, so you should toss them.