Regimen

a formalized schedule by which drugs are administered, including the amount of drug, the number of doses per time period and the time between doses.

A treatment plan that specifies the dosage, the schedule, and the duration of treatment.

With the accent on the first syllable (reg as in Reggie Jackson), a regimen is a plan, a regulated course such as a diet, exercise or treatment, designed to give a good result. A low-salt diet is a regimen.

Schedule of medication.

Any particular TB treatment plan that specifies which drugs are used, in what doses, according to what schedule, and for how long.