Could a person that is taking a medication take Glucerna,or?

It's not good to take anything without the advice of a doctor or pharmacist. Look up the medication you take with "vitamin deficiencies" and see if it causes any. I take Keppra and it sucks up all of my vitamin D. Sometimes they can give me wierd cravings too. Seizures, I've heard, act on the sodium channels of the brain, so that could be your salt cravings. Again, ask a doc! :-) Good luck.