Although frequent and not very troublesome, Eustachian tube dysfunction should not be treated at home or based on independent research. If you experience any of its symptoms, you should go see a specialist and have them examine you and place a clear diagnosis.
Only after that can you receive the adequate treatment and hope to recover your hearing. If you take matters into your own hands, you risk anything from no improvements of your condition to experiencing mild to severe side-effects and even causing ear infections.
Leaving health related risks aside, spending money on useless drugs will not do you any good either, and wasting time online or asking around in pharmacies in not a very good way to use your spare time.
Instead, an appointment with a specialist will get you all the information you need, when you need it, a solution to all your health problems and, why not, a way to avoid unnecessary expenses minimize risks.
So, forget all you thought you knew about Eustachian tube dysfunction, pick up the phone, set up a meeting with a specialist and get the best treatment available for the problems you are facing.