Alpha-pinene (essential pine oil), the most common terpene in the plant world and one often found in cannabis, is helpful for asthmatics. Pinene also promotes alertness and memory retention by inhibiting the metabolic breakdown of acetylcholinesterase. Myrcene is a terpene which is a sedative, a muscle relaxant, a hypnotic, an analgesic (painkiller) and an anti-inflammatory compound.
Limonene, a major terpene in citrus as well as in cannabis, has been used clinically to dissolve gallstones. Limonene terpene also improves mood and relieve heartburn and gastrointestinal reflux. This terpene in studies have shown to destroy breast-cancer cells, and its powerful antimicrobial action can kill pathogenic bacteria.