Final answer:
Peak and trough levels of drugs in a patient's blood are assessed at specific time points to determine efficacy and safety.
Step-by-step explanation:
When assessing peak and trough levels of a drug in a patient, blood samples are typically taken at specific time points. The peak level refers to the highest concentration of the drug in the blood, while the trough level refers to the lowest concentration. These levels are important for determining the efficacy and safety of the medication.
For example, if a drug is administered intravenously, the peak concentration is reached quickly and then gradually decreases. On the other hand, if the drug is taken orally or intramuscularly, it takes longer for the concentration to reach its peak.
By measuring the peak and trough levels of a drug, healthcare professionals can ensure that the drug is being administered at appropriate doses and intervals, and adjust the treatment plan if needed.