Yes, I tried an India-sourced ED tab marketed by a doctor. The product (I can't recall the name but I'll get it for you) contains tribulus terrestris and a few other ingredients.
It was recommended as a cheaper alternative by my pharmacist (who is Indian.) He's fairly young, like me, and has tried 'experimentally' pretty much everything he can legitimately get hold of.
I can say it worked, but not anywhere near as powerfully as Viagra or Cialis.
If I feel in need of a boost I use half a Cilais and half a Viagra (highest dose), and an aspirin or paracetamol (Viagra gives me a headache.)
The effect is truly satisfying and lasting. :smile:
I don't do it often because (a) I don't really need it and (b) these are pharmaceutical drugs which, overall, I steer away from.