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The normal effective dose of Promethazine HCl Syrup (promethazine hydrochloride syrup basic) Basic for that Lively therapy of nausea and vomiting in children or adults is 25 mg.यदि आपके पास पाचन तंत्र बाधा का इतिहास है, तो इस दवा को लेने से बाधा