The ringing you are experiencing is called tinnitus. Currently, there is no single medication or ear drop that directly cures tinnitus. Treatment instead focuses on the underlying cause. If earwax buildup is the cause, wax-softening drops like carbamide peroxide may help. If stress or anxiety worsens the ringing, a doctor might prescribe generic medications like amitriptyline or alprazolam to help you manage the distress. Since this has lasted a year, I highly recommend seeing an Ear, Nose, and Throat (ENT) specialist. They can identify the root cause and recommend highly effective non-drug therapies, like sound therapy. Please be reassured, this is a very common and manageable condition.