How do I stop my dogs eating my medication? I'm worried?

[Body by Jake]

I know this sounds like a strange problem but it's very annoying. See one of my dogs is an ex Customs dog. He was a drug detector dog but got too old to remain operational. My other 2 dogs were trained show dogs (like the circus). I adopted all 3 once they retired. The problem is no matter where I put my steroids (I have a medical condition before you start judging me) Charlie always finds them and the other 2 help him get go them - I once turned on the kitchen light and they were stacked up 3 high like a doggie-pyramid trying to get in to the top cupboard.

Charlie has put on a lot of size due to the medication, which is good, but I've actually lost muscle and I've been lifting weights twice a day 5 days a week.

Also, I have a lock phobia so please don't just say "lock them up!" because obviously I've thought of that.

Thanks to anyone who helps me.