I hope the OP doesn’t mind me answering this one!
It’s possible, yes, but I cannot say how probably. In fact, though, it’s recommended that you don’t store most medications in the bathroom because of the humidity and temperature extremes that room has; most drugs are tested under long-term conditions of 25C/60% relative humidity as part of their approval and continuing stability studies. Any package that tells you to store medication in the fridge probably means it; for whatever reason the data collected at 25/60 wasn’t adequate and the colder temperature is safer.
That being said, there are a lot of drugs that can sit around at 40C/75 RH for a very long time, and have nothing happen to them, just as there are some that begin to degrade in a couple of months, or only after a year, or whenever. Really, the only people who can say if that’s the case for the meds you take are the pharmaceutical company that made them/tested them, and they aren’t going to share that information with you. So the best bet is somewhere other than the bathroom, or otherwise according to the package.
Also, if your drug product comes with a package/cylinder of dessicant inside the bottle, please leave it there. It was approved to be packaged that way. And just because something is in a blister pack does not mean it is impervious to water/humidity - they will not prevent moisture from getting through.
While I’m at it, to answer HeyHomie’s question for the pharmaceutical lab (I don’t know what a pharmacist would do), a good company will have protocols in place that dictates that only men can handle/test the product, and depending on the potency of the drug, even sometimes have all-male packaging lines as well. My first company also had blood tests every 3-6 months to make sure employees handling potent actives weren’t being affected by them (we saw the results, these weren’t tests for illegal drugs!) Many companies, however, will simply rely on gloves/other PPE and hope for the best, which is silly, and always kind of pissed me off. Most of the drugs labelled that way are hormones or hormone mimics, and they can really screw up a woman’s body (look at how little drug there actually is in your standard birth control pill!) The reason it is safe for men is that you guys are so swamped in testosterone, that a little bit of other hormones won’t have any effect - it gets drowned out.
The warnings about pregnant women are largely because no studies have been done on the drug’s effect on children/fetuses (whether it even reaches the fetus, whether it is expressed in breast milk, etc), so the company takes the better safe than sorry approach. Every company I’ve worked for had a policy of removing pregnant women from the lab and assigning them to duties in which they would not contact chemicals for the duration of her pregnancy; no one I know has ever disagreed with that policy, but I’m sure it’s happened.