Whether from injury, or just "fried" from decades of orgasms, I don't think there's a better compound for sexual function "rehabilitation".
Repeated use over a few months seems to build a new "circuit". Not only restoring function lost from disease or injury, but bringing back the kind of intense sensation and orgasm you had as a teenager,
Also, side effects lessen with each use. Eventually they go away entirely, It's not the passing nausea that's the main issue when first starting, but the digestive effects, inducing diarrhea or constipation (it's very GLP like in that regard, affecting GI motility) The lighter you eat the first few times the better off you'll be. A glass of metamucil before can ease the impact significantly. By the 4-5 use of PT there shouldn't be an issue.