Antihelminthics are drugs that expel parasitic worms (helminths) from the body, by either killing or stunning them. The macroinvertebrate parasites treated in this way include, for instance, tapeworms and roundworms, which infest the intestines
Regarding the effect: I do notice an increase in bloodflow and a better
stamina using the pills (I use 50mg). A side-effect I have noticed is that
my nose clogs up so I seem like I have a cold for an hour or so after taking
one pill. No other side-effects than that.