For a therapeutic drug that has a short half-life,for example levetiracetam,when is the appropriate time to collect a blood sample for therapeutic drug assessment?

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The appropriate time to collect a blood sample for therapeutic drug assessment, especially for drugs with a short half-life like levetiracetam, is immediately before the next dose is due. This timing, known as trough level, ensures that the drug concentration measured is at its lowest point, providing critical information on the drug's pharmacokinetics and ensuring that the drug concentration stays within the therapeutic range without reaching toxic levels.

For a Therapeutic Drug That Has a Short Half-Life,for Example