If 100 mg drug is administered and has a half life of 6 hours, the percentage of the drug that will be in the system is 18 hours. a. Trueb. False

Kindly check explanation as the question seems incomplete but the explanation should help.

Explanation:

Given the following :

Initial dosage of drug = 100mg

Halflife of drug = 6hours

After 18 hours, the percentage of drug that will be in the system should be :

Half-life is the time taken for a material to reduce to half of it's initial size.

Since half life = 6 hours

After 6 hours ; amount left = 100/2 = 50 mg

After 12 hours ; amount left = 50/2 = 25mg

After 18 hours ; amount left = 25/2 = 12.5mg

Hence, after 18 hours percentage left in system :

(Amount left / total initial amount) × 100%

(12.5 / 100) × 100%

0.125 × 100%

= 12.5%

explanation:

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