Suggest Treatment For Erectile Dysfunction
A couple of options.
Detailed Answer:
I read your question carefully and I understand your concern.
The most common medication for that purpose which perhaps you already know of are the PDE5 inhibitor class like Sildenafil (Viagra). However when there are issues with the heart, with its blood supply, they might be not safe.
In that case the remaining option is injection of blood vessel dilators of which Alprostadil is the most commonly used. It is very effective but there is the unpleasant downside of having to inject locally, in the corpora cavernosa of the penis.
Another option is the insertion of small pellets containing the vasodilator alprostadil into the urethra. That is done through a device, MUSE (Medicated Urethral System for Erections), but it is less consistently effective than the injections.
I remain at your disposal for other questions.