Eliminate the doctor's libido if they dismiss any sexual side-effects screams of trying to get vengence or "justice". In any case, going to such extremes to ensure doctors experience all the negative side-effects has a huge drawback: what if the doctors need therapy? On one hand that may be viewed as going down the same path as patients, but on the other hand, it prolongs care for actual patients.

Additionally, as more medications are being developed, it would place doctors in a never-ending cycle of taking the medications and enduring negative side-effects. It leaves a lot less time for them to practice at their peak performance. In the end, a likely complaint of patients is they're not getting the ideal care they want, which is the very same complaint that is happening now.

I agree that some doctors don't treat patients with proper dignity, dismiss complaints of symptoms and give a treatment that makes seemingly no sense, even to other doctors. The problem is, not all doctors are like this, some of them are quite reasonable and sympathetic. Unfortunately, the OP's suggestion casts all doctors as unforgiving, unsympathetic and devoid of care for their patients.