The average half life of acetaminophen active ingredient in...

The average half-life of acetaminophen (active ingredient in tylenol) is 2.5 hours. Assume that a patient is given a dose of 1000 mg of acetaminophen. Identify all correct statements. (I) After 5 hours, 250 mg of acetaminophen is left unabsorbed in patient’s body. (II) After 2 hours, 450 mg of acetaminophen is left unabsorbed in patient’s body. (III) After 10 hours, less than 100 mg of acetaminophen is left unabsorbed in patient’s body. (A) none (B) I only (C) II only (D) III only (E) I and II (F) I and III (G) II and III (H) all three

Transcript

00:01 In this problem it is given that acid taminofin has a half life of 2 .5 hours.

00:11 Also it is given that thousand milligram of this drug is administered to a person.

00:18 We are asked to identify the correct statements.

00:21 The first statement is that after five hours, the amount of drug present in the body is 2 .5 hours.

00:31 The second statement is after 2 hours, the amount of drug present in the body is 4 .50 milligram.

00:47 And the third statement is after 10 hours, the amount of drug present in the body is less than 100 milligrams.

00:57 Also, the options provided are none of the statements are correct, only 1.

01:05 Is correct, only 2 is correct, only 3 is correct, the option e is 1 and 2 are correct, option f is 1 and 3 are correct, option g is 2 and 3 are correct and option g is 2 and 3 are correct and option h is all the 3 are correct.

01:39 Now here the drug has a half life denoted as h of 2 .5 hours.

01:46 That means in every 2 .5 hours half of the substance present is absorbed into the body and half remains unabsorbed.

01:56 So here the initial amount denoted as n -0 is 1 ,000 milligrams so that in 2 .5 hours the amount of substance present will be half of thousand that is 500 milligrams.

02:17 So in five hours that is two half life that is it is two times 2 .5 so in five hours the amount of substance that is remain unabsorbed will be thousand by four or it is half of 500 milligram that is 250 so the amount present after 5 hours corresponds to 250 milligram.

02:50 This is the first statement.

02:52 So the first statement is correct...

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