There is nothing over the counter to use for a blocked ear drum. Whether it is truly blocked depends. You could have just some sinus pressure making it feel blocked. You could try a decongestant and see if it relieves the pressure. You could also have a wax build up on the outside of the ear drum, in which case you could use a wax removal kit, just follow the box instructions VERY carefully to avoid damage. If this does not help you should see a Dr. For more instructions.