Final Answer:
The earliest time the next dose could be given is at 8:00 P.M., following the "every 6 hours" instruction for Hydroxyzine 25 mg, as indicated in the prescription. Thus, the correct answer is option c.
Step-by-step explanation:
Hydroxyzine, prescribed at 25 mg with instructions to take one tablet orally every 6 hours as needed for itching, indicates a dosage regimen that allows for a maximum of four doses in a 24-hour period. Considering the patient received the medication at 2:00 P.M., the next dose could be administered six hours later, following the "every 6 hours" instruction. Therefore, the earliest subsequent dose would be at 8:00 P.M (option c).
To calculate this, you count forward in six-hour intervals from the initial dose at 2:00 P.M. This leads to potential doses at 8:00 P.M., 2:00 A.M., 8:00 A.M., and 2:00 P.M., completing the four-dose regimen within 24 hours. This timing adheres to the prescribed regimen without exceeding the recommended frequency of administration.
Remembering the 'q6h' instruction (every 6 hours) is crucial in determining when the subsequent doses can be administered. Adhering strictly to the prescribed interval maintains the efficacy and safety of the medication while ensuring appropriate relief for the patient's symptoms without exceeding the maximum daily allowance. Therefore, the correct answer from the options provided is 8:00 P.M.