Trigonelline (Trigenolline) is a plant alkaloid and a major component of coffee and fenugreek with anti-degranulation, anti-diabetic, antioxidant, anti-inflammatory, and neuroprotective effects. Trigonelline inhibits FcεRI-mediated intracellular signaling pathways, such as phosphorylation of PLCγ1, PI3K, and Akt. Trigonelline (Trigenolline) also inhibits the microtubule formation in RBL-2H3 cells.