Just be aware. Much as you may use the 60 day entry as often as you like in theory, it is possible Immigration will stop you after a number of trips. My 60 day entry was on the page opposite my expired 12 month visa. They could see I wasn't a "tourist" and warned not to do it too often or face denial. Just something to be aware of.
Check with Medisafe online based in BKK. They can often supply drugs if you send them copies of your scripts. I get anti depressants really cheaply. They cannot supply sleepers so not sure about your other ones. They are good, cheap and very fast at sending them to you