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Neo-Synephrine Injection (Phenylephrine Hydrochloride Injection) - Drug Interactions, Contraindications, Overdosage, etc



NEO-SYNEPHRINE INJECTION drug label information in our database does not contain a dedicated section on drug interactions. Please check subsections of WARNINGS AND PRECAUTIONS as well as other sources.


Overdosage may induce ventricular extrasystole and short paroxysms of ventricular tachycardia, a sensation of fullness in the head and tingling of the extremities.

Should an excessive elevation of blood pressure occur, it may be immediately relieved by an a-adrenergic blocking agent (e.g. phentolamine).

The oral LD50 in the rat is 350 mg/kg, in the mouse 120 mg/kg.


NEO-SYNEPHRINE hydrochloride should not be used in patients with severe hypertension, ventricular tachycardia or in patients who are hypersensitive to it or to any of the components.

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