Hidrist is betahistine, supplied as 16 mg and 24 mg tablets. It is used for Ménière’s disease and for vertigo — the spinning sensation caused by inner-ear problems — and for the tinnitus and hearing loss that go with them. It is taken regularly, as prevention rather than rescue.
What is Hidrist?
The South African Medicine Price Registry lists two strengths, both Schedule 3:
| Product | Form | Strength |
|---|---|---|
| Hidrist 16 mg Tablets | Tablet | Betahistine dihydrochloride 16 mg |
| Hidrist | Tablet | Betahistine dihydrochloride 24 mg |
Betahistine is a histamine analogue — an unusual class. It acts weakly at one histamine receptor and blocks another, and the practical effect is thought to be increased blood flow in the inner ear, particularly in the stria vascularis, along with an effect on how the brain adapts to abnormal balance signals.
Ménière’s disease involves a build-up of fluid pressure in the inner ear. Improving microcirculation there is thought to help that pressure resolve, which is the rationale for using betahistine.
The evidence deserves an honest summary. Betahistine is widely prescribed in Europe and South Africa, and many patients report benefit. But large trials have produced mixed results, and a well-conducted trial in Ménière’s disease found no clear advantage over placebo. It is not a medicine with an overwhelming evidence base — it is one that is well tolerated, low-risk, and worth a trial in a condition where the alternatives are limited.
The two strengths are the same medicine. Doses are usually built up and adjusted, and the total daily amount matters more than which tablet it comes in.
What is Hidrist commonly used for?
- Ménière’s disease — the main registered use. Ménière’s causes attacks of vertigo lasting minutes to hours, with fluctuating hearing loss, tinnitus and a sensation of fullness in the ear.
- Vertigo of inner-ear origin, including recurrent vestibular disorders.
- Tinnitus associated with Ménière’s disease.
- Hearing loss associated with Ménière’s disease.
- Vestibular neuritis and labyrinthitis, in some prescribing during recovery.
It is a preventer, not a rescue treatment. Betahistine is taken regularly to reduce how often and how severely attacks occur. It does nothing for an acute attack of vertigo happening now — those are treated with anti-emetics and vestibular sedatives such as prochlorperazine or cinnarizine, and those are deliberately used only short-term, because prolonged use actually slows the brain’s adaptation.
It takes time. Benefit builds over weeks to months. Judging it after a fortnight will make it look useless.
Not all dizziness is Ménière’s, and this matters. Betahistine is for inner-ear vertigo. It does nothing for:
- BPPV (benign paroxysmal positional vertigo) — brief spinning triggered by head position, and by far the commonest cause of vertigo. It is treated with a repositioning manoeuvre such as Epley, performed in minutes, often with immediate resolution. Anyone with positional vertigo should ask about this before taking tablets for months.
- Light-headedness from low blood pressure, dehydration, anaemia or medication.
- Vertigo of central origin, from the brain rather than the ear.
How Hidrist fits into this medicine category
| Group | Examples | Role |
|---|---|---|
| Histamine analogues | Betahistine (Hidrist) | Long-term reduction of Ménière’s attacks |
| Vestibular sedatives | Cinnarizine, prochlorperazine | Acute vertigo — short-term only |
| Anti-emetics | Metoclopramide, promethazine | Nausea and vomiting during attacks |
| Diuretics | Hydrochlorothiazide | Sometimes used in Ménière’s to reduce fluid |
| Repositioning manoeuvres | Epley manoeuvre | BPPV — not a medicine, and highly effective |
| Vestibular rehabilitation | Exercise programmes | Retraining balance; strong evidence |
Two of the most effective treatments in this table are not medicines at all. See the mental health and neurology medicines hub, and the guides to amitriptyline (Trepiline) and sleep medicines (Nurika) for neighbouring conditions.
What to check before using Hidrist
Tell your doctor or pharmacist if you:
- Have or have had a stomach ulcer, or significant indigestion. Betahistine can irritate the stomach.
- Have asthma. Because betahistine acts on histamine receptors, caution is advised — monitor for any worsening.
- Have phaeochromocytoma, where it should not be used.
- Take antihistamines. These work against betahistine and may reduce its effect; conversely betahistine may reduce theirs.
- Take MAOI antidepressants, which can increase betahistine levels.
- Are pregnant or breastfeeding.
Practical points:
- Take it with or after food to reduce stomach upset.
- Take it consistently, at the doses and times prescribed. It works by being taken regularly.
- Give it two to three months before judging whether it helps.
- Keep a diary of attacks — frequency, duration and severity. This is genuinely useful, because vertigo is hard to recall accurately and the diary is what tells you and your doctor whether treatment is working.
- Reduce salt, caffeine and alcohol, which are standard advice in Ménière’s and for some people make a real difference.
Possible cautions and when to ask a pharmacist or doctor
Betahistine is generally well tolerated. Common effects are nausea, indigestion, abdominal discomfort and headache, usually mild and often reduced by taking it with food. Some people notice mild drowsiness.
Get emergency help for:
- Swelling of the face, lips or tongue, difficulty breathing, or a widespread rash.
- Sudden severe headache, especially with neck stiffness or confusion.
- Vertigo with new weakness, numbness, slurred speech, double vision, difficulty swallowing or trouble walking. These suggest a central cause — possibly a stroke — rather than an inner-ear problem, and they need immediate assessment. This is the most important distinction on this page.
Contact your doctor if:
- Attacks are not reducing after two to three months.
- Hearing is worsening, or tinnitus is becoming intrusive.
- Vertigo is triggered by particular head positions and lasts under a minute — that pattern suggests BPPV, which a repositioning manoeuvre often resolves quickly.
- You develop indigestion or stomach pain on treatment.
- Attacks are causing falls, or stopping you driving or working — vestibular rehabilitation and further options exist.
- You have asthma and notice any worsening.
Related medicine guides
Frequently asked questions
What is Hidrist 24 mg used for? Ménière’s disease and vertigo of inner-ear origin, and the tinnitus and hearing loss that accompany them. It contains betahistine 24 mg.
What is the difference between 16 mg and 24 mg? Only the amount of betahistine. The total daily dose matters more than which tablet it comes in.
Can I take it during an attack of vertigo? It will not help an attack in progress. Betahistine is a preventer taken regularly; acute attacks are treated with different medicines.
How long before it works? Weeks to months. Give it two to three months and keep a diary of attacks to judge it properly.
Does it definitely work? The evidence is mixed — it is widely used and well tolerated, but trials have not consistently shown benefit over placebo. It is a reasonable trial rather than a certainty.
Is it an antihistamine? No, the opposite in part — it acts at histamine receptors. Antihistamines can work against it.
Why does my dizziness only last seconds when I turn over in bed? That pattern suggests BPPV, which responds to a repositioning manoeuvre rather than tablets. Ask your doctor about it.
Should I change my diet? Reducing salt, caffeine and alcohol is standard advice in Ménière’s and helps some people noticeably.