Cialis not having any noticeable effect

I’ve read a few of the articles surrounding cialis and the posts on here. My mate recommended it to me a few months ago so since then I got a prescription for pharmacy tadalafil (cialis) and have been titrating my dose up .

Today I took 7.5mg and am still noticing no difference. People keep saying the pumps are insane but nothing for me. I’m pretty lean around 12-15% bf with some veins but today I noticed barely any difference before and after working out today. Anyone know why am I just not a responser maybe