 [ 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 ] probably not but it is good not to do this again if a perforated eardrum is even remotely possible