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The abbreviation Q2H indicates that the drug should be given

a. twice a day
b. every hour
c. by mouth
d. every 2 hours

User Quan Vuong
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1 Answer

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Final answer:

The abbreviation Q2H indicates that the drug should be given every 2 hours, as dosage frequency depends on the drug's half-life and whether it is dose or time dependent.

Step-by-step explanation:

The abbreviation Q2H on a prescription means that the drug should be given every 2 hours. The dosage frequency is determined by various factors, including the half-life of the drug. Some drugs, due to their short half-life, need to be administered multiple times a day, whereas others have longer half-lives, allowing for less frequent dosing. Understanding whether a drug is dose dependent or time dependent is also crucial in determining the effectiveness of the treatment regimen. Dose-dependent drugs require higher concentrations for a shorter duration to be effective, while time-dependent drugs need to maintain optimum levels over a longer period to be efficacious.

User Dean Radcliffe
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