Benadryl Syrup 100ml

Side Effects of Benadryl Syrup 100ml

CNS depression, dizziness, headache, sedation; paradoxical stimulation in children; dryness of mouth, thickened respiratory secretion, blurring of vision, urinary retention; GI disturbances; blood dyscrasias.

Drug Interactions

Masks ototoxicity produced by aminoglycosides. Increases gastric degradation of levodopa and decreases its absorption by reduction of gastric emptying. Antagonises therapeutic effects of cholinergic agents e.g. tacrine, donezepil and neuroleptics. Valerian, St. John's wort, Kava Kava and gotu kola may increase CNS depression. Potentially Fatal: Potentiates CNS depression with alcohol, barbiturates, analgesics, sedatives and neuroleptics. Additive antimuscarinic action with MAOIs, atropine and TCAs.

Contraindications

Hypersensitivity ; neonates, lactation.

Mechanism of Action

Diphenhydramine blocks histamine H1-receptors on effector cells of the GI tract, blood vessels and respiratory tract. It also causes sedation and has some anticholinergic action. Absorption: Absorbed well from the GI tract (oral); peak plasma concentrations after 1-4 hr. Distribution: Widely distributed, CNS; crosses the placenta and enters breast milk. Protein-binding:Highly bound. Metabolism: Extensive first-pass metabolism. Excretion: Via urine (as metabolites, small amounts as unchanged drug); 1-4 hr (elimination half-life).

Special Precautions

Epilepsy; elderly; performing tasks which require mental alertness; angle-closure glaucoma; pyroduodenal obstruction; urinary tract obstruction; hyperthyroidism; raised intraocular pressure; CV disease; acute asthma; pregnancy.

How to Use

Take orally with food and water, as directed by your physician.

How to Store

Keep in a cool, dry place away from sunlight and moisture.

Safety Concerns

• Alcohol: Avoid during treatment.
• Breastfeeding: Not recommended.
• Pregnancy: Contraindicated.
• Liver/Kidney: Use with caution.

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