dr. anthony ziza looked at connor's whole picture and gradually eliminated more than a dozen meds. a practice called deprescribing. >> all the sudden, john stopped having tremors. john's blood pressure stopped dropping. >> reporter: according to a recent list of 40 medications that could cause problems, doctors warn drugs like sleep aids, anti-depressants, and blood pressure pills can have side effects and drug interactions which can lead to confusion, dizziness, or falls. >> as people get older, their physiology changes, their metabolism changes, the way we >> reporter: so you might not need the same meds you needed just a few years ago. ask your doctor at least once a year if you need every drug, that includes over-the-counter medications. always document and talk about side effects. it can be life changing. >> it's my turn. >> reporter: just ask john connor. enjoying every second of his second chance at life. kristen dahlgren, nbc news, boston. >>> we're back in a moment with the first starring in the latest >>> a passing to note from hollywood. actor robert vaughn who starred a