Keeping the meds fresh question perhaps has been answered but perhaps you should address that question also to your M.D.(s) and pharmacist concerning your specific meds within the context of your typical durations and conditions experienced on trail. I for one haul no more than about 2 wks blood thinning supplements(non prescription non pharmaceuticals) on trail or during my travels. On hikes they are stored in a WP stuff sack double Ziploced in entire daily supplies stored within the interior of my pack.

You sharing you've already had 12 wks of Cardiac Rehab helps clarify your situation. However, this is a continuing situation so definitely keep the M.D.(s) in the loop.