hello and welcome to HCM, Eustachian tube dysfunction
is an entity which has not definitive treatment and is treated only symptomatically. Like you mentioned that at present you do not have any symptoms like tinnitus
(buzzing sound in the ear), hearing loss
or sneezing. If thats the case then you do not need to take any medication.
However if you do develop any of the aforementioned symptoms, then you must consider taking at least the anti histamine
You may also try doing steam inhalation with menthol or eucalyptus oil for some relief
hope you recover soon
Dr Sriram Nathan