Betahistine dihydrochloride is a medication commonly used for the treatment of vertigo and dizziness associated with Menieres disease. It is a histamine analog that works by improving blood flow in the inner ear and reducing the pressure in the endolymphatic fluid, which is believed to contribute to the symptoms of Menieres disease.Menieres disease is a disorder of the inner ear characterized by episodes of vertigo, tinnitus (ringing in the ears), hearing loss, and a feeling of fullness in the affected ear. Betahistine dihydrochloride helps alleviate these symptoms by enhancing blood circulation to the inner ear, stabilizing the fluid balance, and reducing the frequency and intensity of vertigo attacks.