HYDROXYZINE oral

Last updated: November 2021

Therapeutic action

– Sedating H-1 antihistamine

Indications

– Moderate anxiety
– Insomnia

Forms and strengths

– 25 mg tablet

Dosage

– Moderate anxiety
Adult: 25 to 50 mg 2 times daily (max. 100 mg daily)
Reduce the dose by half in older patients.

– Insomnia
Adult: 25 mg once daily at bedtime

Duration

–  Moderate anxiety: as short as possible (max. 2 weeks); insomnia: 7 to 10 days.

Contra-indications, adverse effects, precautions

– Do not administer to patients with closed-angle glaucoma, prostate disorders, dementia, history of QT interval prolongation.
– Do not combine with drugs that prolong the QT interval (amiodarone, co-artemether, erythromycin, fluconazole, haloperidol, mefloquine, pentamidine, quinine, etc.).
– Administer with caution (max. 50 mg daily) and monitor use in older patients or patients with hepatic impairment or severe renal impairment.
– May cause:
• drowsiness, headache, dizziness;
• anticholinergic effects (dry mouth, constipation, blurred vision, tachycardia, disorders of micturition);
• rarely: seizures, QT interval prolongation, allergic reactions.
– Administer with caution and monitor combination with:
• central nervous system depressants (opioid analgesics, sedatives, etc.);
• anticholinergic drugs (atropine, amitriptyline, chlorpromazine, promethazine, etc.).
– Avoid alcohol during treatment.
– Pregnancy and breast-feeding: avoid

Remarks

– Storage: below 25 °C -  -