I don't know about rules, I didn't know about them when I went on a plane either.
What I did was put 4 fincar tablets,(like proscar) in the back pocket of one of my jeans in the middle of my clothes in my main luggage, without packaging or anything I just put it in the back pocket.
For a sidenote I went on a plane this past August and I had minoxidil in the form of liquid Rogaine with me at the time. Well not doing proper research about what I was allowed to bring on the plane had its price. Long story short they pulled my bag out of the line and searched it and pulled out the Rogaine in front of all the other folks there. I got it from the guy before anyone noticed and just threw it in the trash right beside him. I wanted to knock the f*****g goofy smile right off his head.
That was the closest I ever came to killing another human.
i flew to thailand and vietnam with them in my carry on, you'll be fine. I flew to Oz and one of those cute-*** dogs sniffed my bag and didnt grass me up so no worries at all.
Christ i came back from thailand with 20 valium and noone said sh*t.
Yeah - I take my meds in my hand luggage / check on luggage wherever I go and I travel at least once a month. Just take your script with you if you have one (which is what I do) and if you don't, rest assured, there's nothing illicit about the drugs we use! Have never even had a single question about it.