Mequitazine
Mequitazine is antihistamine with actions and adverse effects similar to promethazine. Used in the treatment of allergic conditions.
Primary Characteristics
It is of Synthetic origin and belongs to Phenothiazine.
It belongs to H1-antagonist pharmacological group on the basis of mechanism of action.
Molecular Weight: 322.5 · pKa: 8.66 · Solubility in Water: insoluble (4.0le-03g/l) · Solubility in Alcohol: soluble · Non-proprietary name: Mequitazine.

Pharmacokinetics
Absorption: Mequitazine has an oral bioavailability is 70%.
Distribution: Mequitazine has a volume of distribution is 400 litre. plasma protein binding is 90 %.
Elimination: it is metabolised via Hepatic, plasma half-life is 40 hr, renal excretion is 1 %.
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Indications
Mequitazine is primarily indicated in conditions like Allergy, Hay fever, Insect bites, Pruritus, Rhinitis, Urticaria.
Mequitazine is also indicated for secondary conditions like Conjuctivitis.
Contraindications
Mequitazine is contraindicated in conditions like Myasthenia gravis, Paralytic ileus, Close-angle glaucoma, Pyloric stenosis, Prostate adenoma, Alcohol abuse, Hypersensitivity to any component of product.
Dosage
Mequitazine's dosage details are as follows:
| Dose | Single Dose | Frequency | Route | Instructions |
|---|---|---|---|---|
| Adult Dosage | ||||
| 5 mg | 5 mg | Every 12h | PO | |
| Paediatric Dosage (20kg) | ||||
| 0 – 0 | — | — | Not recommended for this age group | |
| Neonatal Dosage (3kg) | ||||
| 0 – 0 | — | — | Not recommended in this age group | |
Drug Interactions
Always consult your physician for the change of dose regimen or an alternative drug of choice that may strictly be required.
Side Effects
Mequitazine is known to cause more or less tolerable side effects which are usually transient. These include Depression, dizziness, Drowsiness.
Warnings / Precautions
Available Brands
None recorded.
Storage Conditions
Drug Classification
- 1.3 — Anti-allergics (Antihistamines) and drugs used in anaphylaxis