Betahistine: What it does and who it helps

Ever felt sudden spinning, ringing in the ear, or pressure that won’t quit? If an ENT mentioned betahistine, they were likely talking about symptoms linked to Meniere’s disease or recurring vertigo. Betahistine is prescribed to reduce the frequency and severity of vertigo attacks and the sense of ear fullness that often comes with them.

People report fewer dizzy spells after a few weeks on the drug, although results vary. It isn’t a cure for the underlying condition, but many patients notice fewer and milder episodes—enough to get back to normal daily life for many.

How betahistine works and usual doses

Betahistine is a histamine analogue. In plain terms, it acts on tiny blood vessels in the inner ear and on neurotransmitters that control balance. That action can improve blood flow and reduce fluid pressure that contributes to vertigo.

Typical dosing starts at 8–16 mg taken two or three times a day. A common regimen is 16 mg three times daily (48 mg total). Doctors often start low and increase based on response and tolerance. Some people stay on treatment for months; others use it during flare-ups. Always follow your prescriber’s plan—dosage can change depending on your symptoms and other health issues.

Side effects, warnings, and interactions

Most side effects are mild. Expect headaches, stomach upset, nausea, or mild skin reactions in a small number of people. Dizziness may briefly worsen for some when they start the drug. Serious reactions are rare, but allergic reactions can happen—seek immediate care if you get hives, swelling, or trouble breathing.

Betahistine can be less helpful or unsafe for people with pheochromocytoma (a rare adrenal tumor). It may also interact with sedating antihistamines; since it works on histamine pathways, combining it with some antihistamines can reduce effectiveness. If you take medications for high blood pressure, diabetes, or have active peptic ulcer disease, mention them to your doctor—your dose or choice of medicine might change.

In Canada, betahistine is commonly available by prescription under brand names such as Serc or as generics. Pharmacies and ENT clinics can advise on availability and cost. If you’re buying online, pick a licensed Canadian pharmacy and confirm a real prescription is required.

Quick practical tips: keep a symptom diary (note length, triggers, and severity of attacks), take the drug with food if it upsets your stomach, and give a new treatment at least 4–8 weeks before deciding it doesn’t work. If you plan to stop, ask your doctor whether tapering is needed—some people prefer to reduce slowly.

Questions for your clinician: Is betahistine right for my type of vertigo? How long until I should see improvement? What side effects should I watch for? Having answers to these makes treatment smoother and gives you control over your recovery.