THC-Varin (stupid autocorrect on my phone from prior post) (AKA THC-V)is a highly-psychoative, hard-hitting THC homologue that is highly stimulating with very short duration of effect. High levels of this are present in African and Asian sativa strains. If you've ever taken a hit of stuff that got you high immediately, chances are you just had a quick THC-V dose from the strain. It lasts about 15 minutes, then fades away, leaving the normal delta-9 THC to do its thing for the next few hours.