 [ Symptoms ] i am having severe constant stabbing pain in the top of my left shoulder hurts when i breathe what is going on  taking a deep breath in or a shallow breath it hurts either way it does not extend into my arm nor up my neck the pain does not go down into my back either i have some gallbladder trouble and wondered if this might be a contributing factor taking an otc pain med i e advil does not help this pain go away it wears off with time but sometimes this lasts for days [ Disease ] flagyl or metronidazole does not have a commercially available liquid formulation however there are several different population groups that cannot take the pill form including children the elderly and animals therefore there is a compounded recipe that pharmacists can make as a liquid formulation check with your doctor about prescribing the compound understand that the compound needs to be refrigerated is only stable for 30 days and may have an unpleasant taste