20 mg daily is excessive and wouldn't be necessary if your hormones were where they should be. Typically you are either on a low dose every day, or you take a one-time 20mg dose prior to sex if you don't want to use it every day.
I can't even imagine how expensive that would be too 20mg of pharma grade cialis per day jesus.
The issue is, they are prescribing Cialis as a bandaid for the real issue at hand here, which are your volatile as shit testosterone and estrogen levels which they are messing with like uneducated idiots.
Basically how your physician has it set up right now is you do a fat giant shot once, and your levels spike like crazy, leading to a sharp rise in Estrogen as well from all of the testosterone suddenly influxed into your system and aromatizing, and then over the next 2 weeks your levels steadily decline until they get too low again by the time your next shot has come around.
The ideal approach is to do smaller more frequent shots, which will minimize your estrogen spikes, as well as minimize your testosterone spikes obviously, keeping your hormones at a stable level.
At minimum I'd be pinning 2x per week.
Of course this isn't actual medical advice, its' simply my opinion on the matter. I suggest getting a doc who knows what they're talking about.