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I have Promethazine syrup without codeine in it. I was wondering if I take Tylonel 3 will it be the same as drinking regular Promethazine/codeine syrup. Is it safe? And what dosage of Tylonel 3 would be the equivalent of drinking regular Promethazine/codeine syrup?
Promethazine/codeine syrup has 6.25mg promethazine/10mg codeine per 5mL. So 1 fluid oz would contain 37.5mg promethazine/60mg codeine. A Tylenol 3 contains 30mg of codeine. So taking (2) Tylenol 3's + 1oz promethazine hcl syrup would = 1oz promethazine/codeine cough syrup. Got it?