In medicine, a cohort study is often undertaken to obtain evidence to try to refute the existence of a suspected association between cause and effect; failure to refute a hypothesis often strengthens confidence in it.
Rifampin (Rifadin Â®) is a prescription antibiotic that comes in oral (taken by mouth) and injectable forms. Oral rifampin is approved for the following uses: 1  To treat tuberculosis, usually along with other tuberculosis medications.
Available in the form of a capsule or an injection, rifampin is an antibiotic that is typically used once or twice a day. The rifampin dosage your healthcare provider uses will depend on your weight and the reason you are using it, among other factors.