Causes of DYSGEUSIA (metallic taste): - Antibiotics (clarithromycin, metronidazole tetracycline), Allopurinol, captopril, Lithium, Methazolamide, Metformin, Lunesta and more... heres a video discussion on this. https://t.co/FphprLh1Sf https://t.co/1wkjQxA9UZ