Advice please

[Potnoodles]

I have hesitated with this post because I hate a fuss, but I could do with some advice.
My superhero Rob is not 100% .
Enlarged prostate.
Dr has put him on meds [Rob hasn't taken them yet] and this is where I need help.
The medication is "Tadalafil" which apparently is a type of viagra.??
 I googled it but there is so much conflicting advice I am lost. I can't talk to Rob about it .We have never had anything to do with this type of meds, we've never had issues in that area . Crap I'm rambling..... look ,anybody with any experience/info about this would you mind pm ing me ,I don't expect any public replies here, but I kind of need to know what to expect ,side effects ?etc
Thanks all sorry to be a whimp.

Nicky x

[Clitical Thinking]

I don't have any personal history with it or with similar medication, but it sounds like it's used to treat both erectile dysfunction and an enlarged prostate. From the Mayo Clinic:

Tadalafil is used to treat men who have erectile dysfunction (also called sexual impotence). Tadalafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. The penis is one of the areas where this enzyme works.

Erectile dysfunction is a condition where the penis does not harden and expand when a man is sexually excited, or when he cannot keep an erection. When a man is sexually stimulated, his body's normal response is to increase blood flow to his penis to produce an erection. By controlling the enzyme, tadalafil helps to maintain an erection after the penis is stroked by increasing blood flow to the penis. Without physical action to the penis, such as that occurring during sexual intercourse, tadalafil will not work to cause an erection.

Tadalafil is also used to treat men who have signs and symptoms of benign prostatic hyperplasia (BPH). BPH is caused by an enlarged prostate. Men with BPH usually have difficulty urinating, a decreased flow of urination, hesitation at the beginning of urination, and a need to get up at night to urinate. Tadalafil will make these symptoms less severe and reduce the chance that prostate surgery will be needed. This medicine is also used to treat erectile dysfunction and signs and symptoms of BPH.

https://www.mayoclinic.org/drugs-supplements/tadalafil-oral-route/description/drg-20067204#:~:text=Descriptions,5%20from%20working%20too%20quickly.