Betahistine dihydrochloride is a histamine analog structurally related to the body's own histamine. As a compounded oral capsule, it is prepared by Bayview Pharmacy in the strength your provider orders.
Each capsule contains betahistine as the active ingredient along with standard capsule excipients such as a filler and a capsule shell.
How does it work?
The mechanism is still being studied and remains proposed rather than established. Betahistine is described as a weak agonist at H1 histamine receptors and an antagonist at H3 receptors, and it may improve blood flow in the inner ear and reduce pressure from endolymphatic fluid, which could in turn lessen the symptoms of Ménière's disease.
What is it used for?
Betahistine has been studied for Ménière's disease and its associated vertigo, episodic dizziness, and tinnitus. Evidence for these uses is of limited and variable certainty, and a systematic evidence review found the benefit is not firmly established. It does not treat or cure any condition, and any use is off-label and determined by your provider.
Betahistine availability in the US vs. other countries
In much of the world betahistine is a routinely prescribed, commercially manufactured medicine, but that is not the case in the United States. An earlier US approval was withdrawn because effectiveness had not been established, so today the only way US patients typically access it is through a compounding pharmacy.
How is it used?
Betahistine is taken by mouth. The total daily amount is often divided into more than one dose, but the specific strength, number of capsules, and schedule are set by your provider based on your situation.
Side effects & safety
Reported effects are usually mild and include stomach or GI upset, nausea, and headache. Betahistine may interact with antihistamines, and background on its clinical evaluation is summarized in the evidence review. Tell your provider about all medicines you take and report any reaction that concerns you.
Who should not use it?
Caution is advised in people with an active peptic ulcer, asthma, or pheochromocytoma. Share your full medical history with your provider so they can judge whether betahistine is suitable for you.
How should it be stored?
Store capsules at room temperature, away from heat, light, and moisture, and keep them out of reach of children. Follow any specific storage instructions on your prescription label.
Why is this compounded?
Because no FDA-approved betahistine product is marketed in the US, a compounding pharmacy prepares it so that patients whose providers prescribe it can obtain the medication in a suitable capsule strength.
Clinical details for prescribers
Regulatory status. Betahistine is not a controlled substance. It is not FDA-approved in the United States (it is approved in many other countries, e.g., as Serc) and is available in the US only as a compounded medication; use for Ménière's disease and vestibular symptoms is off-label.
Formulation & dosing. Compounded as 8, 16, and 24 mg oral capsules. Commonly reported dosing is 8–16 mg three times daily with food, with maintenance in the range of 24–48 mg per day in divided doses; response is typically assessed over weeks to months.
Counseling / clinical points:
- Histamine analog — use caution in patients with asthma, active or historical peptic ulcer disease, or pheochromocytoma
- Antihistamines can pharmacologically attenuate betahistine's effect — review the medication list
- GI upset and headache are the most common adverse effects; taking doses with food helps
- Pair with standard Ménière's supportive care (sodium restriction, vestibular rehabilitation) as appropriate
Betahistine's H1-agonist / H3-antagonist activity is thought to improve inner-ear microcirculation and reduce vertigo frequency.
Betahistine Capsules is a compounded medication and is not FDA-approved. This information is educational and is not medical advice. Your provider determines whether it is appropriate and sets the dose.
