I've heard people online talking about "stacking" Viagra with other ED drugs. How is this better than just taking Viagra by itself?
In pharmacology and medicine, "stacking" is an informal term that refers to taking two or more drugs at the same time, or in rapid succession, or alternating doses. In clinical settings, it's sometimes done with painkillers. The rationale is that two drugs that do the same thing but a little differently will have a synergistic effect, or prevent the patient from developing a tolerance to one drug.
The kind of stacking you've heard about probably refers to taking different erectile dysfunction drugs simultaneously, which is unsafe and is something I'm sure no doctor would ever approve of. It's just not a good idea, for several reasons. First of all, you shouldn't need to. There are a few different ED drugs available now, and one of them should work for you by itself.
Stacking is just unsafe. If you're combining ED drugs, you're overmedicating yourself. If you take the recommended dosage of more than one drug, you're way
overmedicating. People who "stack" drugs may lower the dosages to try to compensate, but who knows how effective this is, especially if the drugs interact.
That's another thing - these drugs are not intended to be taken together, so you don't know how they will interact. There could be unanticipated side effects. Because Cialis has a longer period of effectiveness, some people think that combining it with Viagra or Levitra will extend those drugs' effects, but who knows? You could be more likely to experience priapism, which would be uncomfortable and embarrassing if you have to seek medical treatment.
Also, while you might be able to score a couple of different samples of ED drugs from your physician, no responsible doctor would prescribe more than one at a time. So chances are the guys who are stacking are getting their drugs from multiple and possibly sketchy sources. If you're not getting medication prescribed through a doctor or certified online pharmacy, who knows what you're getting. That stuff can be dangerous.
But what about stacking with supplements, you say - meaning herbal supplements, like horny goat weed, or "herbal Viagra" blends. Well, you should be careful with those too. You often don't know what's really in them, and it's impossible to gauge what their effect will be when combined with prescription drugs. Really, don't mess around with drug cocktails without checking with your doctor.
By the way, you didn't happen to come across this suggestion on a body building forum, did you? Because among body builders who use steroids, "stacking" steroids, and ED drugs, is not uncommon. You know why? Somewhat perversely, anabolic steroids can stimulate sex drive, but increase the likelihood of erectile dysfunction. They also make your junk shrink, but I don't know any remedy for that.