I've heard of this and need to do more research on the forum like...how much it would be and the learning curve and if his Dr would RX it (i'm assuming it's prescription). It sounds like from what i've read that the erections can be as hard as it can get, i know he really isn't that satisfied with Cialis or Viagra (enough for penetration but he would like it harder) and the S/E's of esp Viagra (nasal congestion) he just about cannot stand...
VC and JPB give the more sensible approach but seeing as you stated in a previous thread:
He's a young 70, health issues include non alcoholic liver cirrhosis (mild, had Hep C) on low amount of opioids for pain management, on NDT for thyroid. Has been on TRT since October 2017 when he tested out around 300 and below normal Free T. Went on standard 100 mg and shot twice weekly. Went to 3x weekly and BW showed minor improvement (500's and still below normal FT) got SHGB tested and it was high normal so on advise from the gentlemen in this group, went back to twice weekly shots which would hopefully bring up FT which indeed it did but low normal.
Doc rx'd 150 mg/wk and on more advice from this group, decided to go slow at 140 mg/wk and he felt better, had better libido, energy. Still has ED and has to use Viagra or Cialis.
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There is a good chance at his age he may have poor vascular/endothelial health and although he has tried cialis (you only mention daily 5 mg) and Viagra (no dose stated).
Intracavernosal injections would be worth looking into if higher doses of the oral pde-5 inhibitors are not effective or cause too many sides as you stated above....."It sounds like from what i've read that the erections can be as hard as it can get, i know he really isn't that satisfied with Cialis or Viagra (enough for penetration but he would like it harder) and the S/E's of esp Viagra (nasal congestion) he just about cannot stand...