Collocations for regimen - noun

strict
combined
daily
a sensible daily regimen of vitamin supplements

dietary
exercise, fitness, training, workout
a strenuous training regimen

drug
treatment
antibiotic, chemotherapy, etc.
dosage, dose

use
We used a combined regimen of chemotherapy and radiation therapy.

follow
She follows a strict fitness regimen.

begin, start
He began a new fitness regimen.

continue, maintain
It is important to maintain a training regimen.

comprise sth, consist of sth, include sth, involve sth
a treatment regimen comprising two antibiotics