Avimax
✅ Nausea relief
✅ Vomiting prevention
✅ Motion sickness treatment
✅ Allergy symptom relief
✅ Sedation induction
Avimax contains Promethazine.
✓ Medisch beoordeeld door Morgan Ellis — Apotheekonderzoeker · 8 jaar ervaring · Laatst beoordeeld: mei 2026
Snelle antwoord
Avimax is een merk van promethazine 25 mg — a first-generation H1 antihistamine with strong sedative, anticholinergic and antiemetic action. Take one tablet 30–60 minutes before travel for motion sickness, or 12.5–25 mg every 4–6 hours for nausea or post-operative use. This is the higher-strength sibling of Phenergan 10 mg — pick Avimax 25 mg when the lower dose is insufficient and you do not need to drive afterwards.
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Avimax is sourced from WHO-GMP gecertificeerde fabrikanten, packed discreetly, and shipped worldwide. Every order is backed by our Reshipment Assurance Policy and supported by 1,400+ klantbeoordelingen.
Avimax is a specialist-supervised antihistamine containing Promethazine, a first-generation antihistamine belonging to the phenothiazine class. Used for decades in clinical practice, Avimax tablet provides reliable relief from allergic conditions, nausea, vomiting, and motion sickness. It also has well-established sedative properties that make it useful as a pre-operative or post-operative adjunct.
When you buy Avimax online from MedsBase, you receive genuine, pharmaceutical-grade Promethazine tablets shipped from licensed facilities with discreet packaging and worldwide delivery.
How Avimax Works
Avimax promethazine exerts its therapeutic effects through multiple pharmacological mechanisms, making it one of the most versatile first-generation antihistamines available.
- H1 receptor antagonism — Promethazine competitively blocks histamine at H1 receptors throughout the body. This action reduces allergic symptoms such as sneezing, itching, runny nose, and watery eyes by preventing histamine from triggering the inflammatory cascade.
- Antimuscarinic (anticholinergic) activity — Avimax blocks muscarinic acetylcholine receptors, which contributes to its drying effect on secretions and plays a key role in its anti-nausea and anti-motion sickness properties.
- Dopamine antagonism — By blocking dopamine D2 receptors in the chemoreceptor trigger zone, Promethazine provides potent antiemetic effects, helping to control nausea and vomiting from multiple causes.
- Sedative action — Promethazine crosses the blood-brain barrier readily and depresses CNS activity, producing dose-dependent sedation that is clinically useful in pre- and post-operative settings.
After oral administration, Avimax is well absorbed from the gastrointestinal tract. Effects typically begin within 20 minutes and last for 4 tot 6 uur, though sedative effects may persist longer. The drug is extensively metabolized in the liver and excreted primarily through the urine.
Avimax Uses and Indications
Avimax tablet is indicated for a broad range of conditions due to its multimodal mechanism of action.
Allergic Conditions
Avimax is effective for the symptomatic relief of allergic rhinitis (hay fever), urticaria (hives), allergic conjunctivitis, and other allergic reactions. It reduces sneezing, itching, nasal congestion, and skin rashes caused by histamine release.
Nausea and Vomiting
Avimax for nausea is one of its most common applications. The combination of H1 blockade, anticholinergic effects, and dopamine antagonism makes it highly effective against nausea and vomiting from various causes, including post-operative nausea and vomiting (PONV), drug-induced nausea, and gastrointestinal illness.
Motion Sickness
Promethazine is a well-established choice for preventing and treating motion sickness. When taken 30 to 60 minutes before travel, Avimax can significantly reduce or prevent the dizziness, nausea, and vomiting associated with car, sea, or air travel.
Sedation
Due to its pronounced CNS-depressant properties, Avimax is used as a sedative before and after surgical procedures, during labor, and to promote sleep in short-term situations where sedation is medically appropriate.
Avimax Dosage Guide
The recommended Avimax dosage varies depending on the condition being treated. The following table outlines standard adult dosing guidelines.
| Condition | Dosering | Frequency / Notes |
|---|---|---|
| Allergic conditions | 25 mg | Once at bedtime, or 12.5 mg before meals and at bedtime |
| Nausea and vomiting | 25 mg initial dose | Then 12.5–25 mg every 4–6 hours as needed |
| Motion sickness | 25 mg | 30–60 minutes before travel; may repeat after 8–12 hours |
| Pre-operative sedation | 25–50 mg | Night before surgery and/or before the procedure |
| Sedation (nighttime) | 25–50 mg | At bedtime as directed by physician |
Pediatric dosing (children over 2 years): 0.5 mg per pound of body weight, adjusted for the specific indication. The dose should not exceed 25 mg for a single administration unless directed by a physician. Always use the lowest effective dose for the shortest duration necessary.
Administration tips: Avimax tablets should be taken with a full glass of water. Taking the medication with food may reduce stomach upset. For motion sickness prevention, timing the dose 30 to 60 minutes before departure is essential for optimal effectiveness.
Benefits of Avimax
- Multi-purpose relief — a single medication addresses allergies, nausea, motion sickness, and the need for sedation
- Rapid onset — effects begin within approximately 20 minutes of oral administration
- Proven track record — Promethazine has been used safely in clinical practice for over six decades
- Potent antiemetic — effective against nausea and vomiting through multiple receptor pathways
- Effective motion sickness prevention — one of the most reliable medications for travel-related nausea and dizziness
- Useful sedative properties — provides calming effects beneficial in perioperative and acute clinical settings
- Affordable and accessible — a cost-effective alternative to newer, brand-name antihistamines and antiemetics
Side Effects of Avimax
Like all medications, Avimax may cause side effects. Most are mild and dose-related, resolving as the body adjusts to treatment.
Common side effects:
- Drowsiness and sedation (the most frequent side effect)
- Dry mouth, nose, or throat
- Dizziness or lightheadedness
- Wazig zien
- Obstipatie
- Urineretentie
Less common side effects:
- Confusion or disorientation, especially in elderly patients
- Photosensitivity (increased sensitivity to sunlight)
- Tinnitus (ringing in the ears)
- Nausea or vomiting (paradoxical)
Serious side effects (seek immediate medical attention):
- Respiratory depression — particularly dangerous in children; can be fatal
- Neuroleptic malignant syndrome (NMS) — a rare but life-threatening reaction characterized by high fever, muscle rigidity, altered consciousness, and autonomic instability
- Severe dystonic reactions — involuntary muscle contractions affecting the face, neck, or back
- Significant drop in blood pressure — especially when moving from sitting to standing
- Seizures — particularly at high doses or in predisposed individuals
Important Warnings
Boxed Warning — Children Under 2 Years: Avimax (Promethazine) is contraindicated in children under 2 years of age. Fatal cases of respiratory depression have been reported in this age group. Promethazine should be used with extreme caution in children aged 2 and older, and the lowest effective dose should always be used. Avoid concurrent use with other respiratory depressants in pediatric patients.
Additional precautions:
- Impaired alertness — Do not drive, operate heavy machinery, or perform activities requiring mental alertness until you know how Avimax affects you.
- Alcohol — Avoid alcohol while taking Avimax, as it intensifies CNS depression and sedation.
- Elderly patients — Increased risk of confusion, sedation, falls, and anticholinergic side effects. Use the lowest effective dose.
- Zwangerschap — Use only when clearly needed and the benefits outweigh the risks. Consult your healthcare provider.
- Liver impairment — Promethazine is extensively metabolized by the liver; dose adjustment may be necessary in patients with hepatic disease.
Geneesmiddelinteracties
Avimax can interact with several classes of medications. Inform your healthcare provider about all medications, supplements, and herbal products you are taking before starting Avimax promethazine.
- CNS depressants — Opioids, benzodiazepines, barbiturates, sleep aids, and other sedating medications can dramatically increase sedation and respiratory depression when combined with Avimax.
- MAO-remmers — May prolong and intensify the anticholinergic and sedative effects of Promethazine. Concurrent use should be avoided or closely monitored.
- Anticholinergica — Other medications with anticholinergic properties (tricyclic antidepressants, certain antipsychotics, antiparkinson agents) can increase the risk of side effects such as urinary retention, constipation, dry mouth, and confusion.
- Epinephrine — Promethazine may reverse the vasopressor effect of epinephrine. Do not use epinephrine to treat hypotension caused by Promethazine; use norepinephrine or phenylephrine instead.
- Levodopa — Promethazine may reduce the effectiveness of levodopa due to its dopamine-blocking action.
Frequently Asked Questions (FAQ)
What is Avimax tablet used for?
Avimax tablet is used to treat allergic conditions such as hay fever and hives, to prevent and treat nausea and vomiting (including post-operative nausea), to prevent motion sickness, and as a short-term sedative. Its active ingredient, Promethazine, works through multiple mechanisms that make it effective across all of these indications.
How quickly does Avimax work?
When taken orally, Avimax typically begins working within 20 minutes. The full antiemetic and antihistamine effects are usually felt within 30 to 60 minutes. For motion sickness prevention, the tablet should be taken at least 30 minutes before the start of travel to allow adequate absorption.
Can Avimax be used for sleep?
Promethazine is sometimes prescribed or used short-term for its sedative effects to promote sleep. However, it is not recommended as a long-term sleep aid. Tolerance to the sedative effect can develop, and there are safer alternatives specifically designed for chronic insomnia. Always follow your physician’s guidance regarding the use of Avimax for sedation.
Is Avimax safe for children?
Avimax is strictly contraindicated in children under 2 years of age due to the risk of fatal respiratory depression. In children aged 2 years and older, it may be used with caution at the lowest effective dose under medical supervision. Parents and caregivers should be vigilant for signs of excessive sedation or breathing difficulties.
Can I drive after taking Avimax?
No. Avimax causes significant drowsiness in most people. You should not drive, operate machinery, or engage in activities requiring full mental alertness until you know how the medication affects you. The sedative effects may persist for several hours after a dose. Combining Avimax with alcohol or other sedatives further impairs your ability to function safely.
What is the difference between Avimax and newer antihistamines?
Avimax contains Promethazine, a first-generation antihistamine that crosses the blood-brain barrier and causes sedation. Newer (second-generation) antihistamines such as cetirizine and loratadine are designed to work primarily outside the central nervous system, causing significantly less drowsiness. However, Avimax offers antiemetic and sedative benefits that newer antihistamines do not provide, making it the preferred choice when those effects are needed.
Disclaimer
This product information is provided for educational and informational purposes only and does not constitute medical advice. Avimax (Promethazine) is a specialist-supervised medication that should only be used under the supervision of a qualified healthcare provider. Always consult your doctor or pharmacist before starting, stopping, or changing any medication. The information presented here is not intended to replace professional medical advice, diagnosis, or treatment. Individual responses to medication may vary. MedsBase does not assume liability for the use or misuse of any product described on this page.
Veelgestelde vragen
Other Travel Sickness Treatments
- Phenergan (Promethazine 10 mg) — same molecule, lower strength
- Diligan (Meclizine 25 mg) — less sedating antihistamine
- Draminate (Dimenhydrinate 50 mg) — original Dramamine equivalent
- Vertin (Betahistine 8 mg) — for vestibular vertigo / Meniere’s
- Betavert Tab (Betahistine 24 mg) — full dose Meniere’s
More options in Travel Sickness Tablets
Gerangschikt op recente bestelvolumes van MedsBase — wat andere klanten in deze categorie kiezen.
| Sterkte | 25 mg |
|---|---|
| Hoeveelheid | 30 Tabletten, 60 Tabletten, 90 Tabletten, 180 Tabletten |
Avimax
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