Generic Aralen is used for treating and suppressing acute attacks of certain strains of malaria and a certain type of parasitic infection (extraintestinal amebiasis). More info »
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.