How to get cured from allergic rhinitis with OTC drugs?

What do you mean by. ... Cure? If you truly want to have it never come back, then none of the otc meds will do this. The otc medications available to treat allergic rhinitis are anti-histamines. They block the effects of histamine. Itching, swelling, redness, sneezing and pouring watery darainage. All work well for this, some more than others. They work better if you take them before the reaction starts.
Cannot. Cure of allergic rhinitis will require visiting an allergist, getting tested and undergoing desensitization treatment. You can minimize some of the symptoms with otc medications but this is likely to be only marginally beneficial.