How about we NOT focus on whether this bloke gained muscle and more so on the topic at hand? The subject matter here is the use of antipsychotic and other related medications with steroids, not who grew more off 20ml of test. No one gives a fuck.
Anyhow OP, I've been on every drug you can think of. I have bipolar disorder. Currently on old-faithful Seroquel at around 800-1,000mg before bed as it's the only thing I can take to sleep, as well as a few other things. My psychiatrist informs me I'm one of maybe three people he's ever treated that require dosages as high as I take. To put it in perspective, I was once on lithium and taking 2 (or maybe 2.5?) GRAMS daily and that only just scraped me in to therapeutic levels. I saw a new psych and was taken off it so quick as my doc said if I'd become too dehydrated I would've died.
In my opinion, everything is better on test. I now run a TRT dose and blast/cruise. Years of this psych medication will cause an early death, so why not make the most out of what you enjoy?