 [ Symptoms ] what are the risks of using carbamide peroxide drops on a perforated eardrum  i initially thought my symptoms might have been due to a build up of earwax i used otc carbamide peroxide in an attempt to clear out any possible blockage i only used it once as it actually increased the sense of fullness in the affected ear which i assume was due to some of the fluid draining into the perforation about a week after using the drops i was properly diagnosed with a perforated eardrum could i have done any damage by using carbamide peroxide drops on my perforated eardrum [ Disease ] not enough information rather than spend your time in self diagnosis from the flu to reasons for your head pain like sinusitis it may be more beneficial for you to seek proper medical care