Talk to Ent Specialist on Nose Sneezing Allergy

Respected Sir i have started the symptoms of Nose Sneezing Allergy since 15 days. I went to ENT doctor and he gave me the prescription. i used these medicine for 10 days during which i remained normal. Now i am using only Betnesol Drops in nose 3 times a day but this is of no use for me as my nose sneezing allergy is again irritating me despite of using these medicines. So kindly suggest me the permanent method to get rid of this allergy or if it is not possible then kindly tell me its best treatment/medicine so that may get normal and can remain cool. Please tell me its best medicine so that i can treat it permanently or at maximum level. please. i am student of 2nd Year (Pre-medical). kindly help me in getting rid of this irritating nose allergy. please. Thanks