Chemex is a sativa weed strain made from a genetic cross between 91 Chemdog, GSC, and Tropicana Cookies #1.  Chemex, also known as Chemex Sativa, is a creation by Cresco, a cannabis company that operates in multiple states and offers premium flower, concentrates, edibles, and more. Chemex is 25% THC, making this strain an ideal choice for experienced cannabis consumers. Leafly customers tell us Chemex effects include feeling energetic, creative, and happy. Medical marijuana patients often choose Chemex when dealing with symptoms associated with fatigue, depression, and pain.