 [ Symptoms ] how long will it take until antibiotics start helping my ear infection  i was prescribed an antibiotic for an ear infection 3 days ago and i have yet to feel relief from the dizziness and pressure in my head what should i do [ Disease ] that would not be very likely the tiny amount of those eyedrops may contain lidocaine but this has nothing to do with cocaine besides you should not be using these eye drops anyway unless specifically prescribed by an eye care professional