Acetaminophen, the active ingredient in most over-the-counter pain relievers, ca

Question

Acetaminophen, the active ingredient in most over-the-counter pain relievers, can cause liver damage if too large a dose is taken too frequently. Therefore, accurate dosing for children and infants is of utmost importance due to their smaller size. A standard bottle of infant strength Tylenol contains approximately 60.0 mg of acetaminophen in each 0.50 teaspoon. If the doctor recommends a dose of 40.0 mg acetaminophen per 4.5 kg of body weight, exactly how many milliliters of infant. Tylenol should be administered to an 8.5 pound baby? (192 tsp = I qt. I qt " 946L. 454 g = 1 lb.)

Explanation / Answer

Here as 1 lb =0.454 kg

so 8.5 lb = 8.5 x 0.454 = 3.859 kg.

Further as 192 tsp = 0.946 L, so clearly 0.5 tsp = 0.946 x 0.5/ 192 = 0.0024635 L = 2.46 ml

Now as 4.5 kg body needs 40 mg, so clearry

3.859 kg body needs = 40 x 3.859 /4.5 = 34.3 mg

Now 60 mg is there in 2.46 ml,

so 1 mg is there in 2.46/60 ml

and total 34.3 mg is there in = 2.46 x 34.3 / 60 = 1.4

So exactly 1.4 ml of infant Tylenor should be administered to an 8.5 pound baby.

Answer

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