Haven't heard even of a brand name 'Falcon', ear drops. Ear drops are usually used for wax buildup, or in acute external or middle ear infections and these drops have a combination of antibiotics and steroids
. But the type of ear drops that patients usually do complain of a stinging sensation, are the 'anti fungal' ear drops used in fungal otitis externa
..and that I suspect is what she may have been prescribed...but this is just an educated guess!