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.
Some antiviral medications reduce the effectiveness of rifampin, including: 1  Darunavir (Prezista) 2  Atazanavir (Reyataz) 3  Fosamprenavir (Lexiva) 4  Saquinavir (Invirase) 5  Tipranavir (Aptivus)