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PRN dosing

Also called: "As needed" dosing

Taking a medication only when needed for a specific symptom, rather than on a fixed daily schedule. Some prescribers allow PRN low-dose trazodone for occasional sleep trouble.

PRN trazodone use for sleep should still follow a prescriber's specific instructions on maximum frequency and dose, since even "as needed" use carries the same interaction and side-effect considerations as scheduled use.