What does the medical abbreviation x1 mean?

Answer 1

multiplied by one(1), one time, or one dose. For instance, in areas of high Lyme disease incidence, you may be prescribed doxycycline 200 mg po x1 after removal of an engorged tick.

Answer 2

The medical abbreviation x1 typically means "times one," referring to a single dose or instance of a treatment or medication.