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Your symptoms indicate that your ear blockade is from inside. Therefore, ear drops will not help you. Ear blockade by wax is usually unilateral and very rarely bilateral.
On the other hand, blockade of ear due to eustachian tube dysfunction is usually bilateral (involving both the ears) as in your case. If the blockade is due to eustachian tube dysfunction and patient uses any ear drops, that will do harm. Please follow the advised treatment and you will be fine.