Ritonavir (ri ton’ ah veer) Norvir PREGNANCY CATEGORY B Drug Class Antiretroviral Therapeutic Actions Antiviral activity; inhibits HIV protease activity, leading to decrease in production of HIV particles. Indications Treatment…

Risperidone (ris peer’ i dohn) Risperdal, Risperdal Consta, Risperdal M-TAB PREGNANCY CATEGORY C Drug Classes Antipsychotic Benzisoxazole Therapeutic Actions Mechanism of action not fully understood: Blocks dopamine and serotonin receptors…

Risedronate Sodium (rah sed’ dro nate) Actonel, AtelviaDNC PREGNANCY CATEGORY C Drug Class Bisphosphonate Therapeutic Actions Affects osteoclast activity by reducing the enzymatic and transport processes that lead to resorption…

Riociguat

Rimantadine Hydrochloride (ri man’ ta deen) Flumadine PREGNANCY CATEGORY C Drug Class Antiviral Therapeutic Actions Synthetic antiviral agent that inhibits viral replication, possibly by preventing the uncoating of the virus….

Riluzole

Rilpivirine (rill pah vye’ rin) Edurant PREGNANCY CATEGORY B Drug Classes Antiviral Nonnucleoside reverse transcriptase inhibitor Therapeutic Actions Binds directly to reverse transcriptase and blocks both RNA- and DNA-dependent polymerase…

Rilonacept

Rifaximin (reh facks’ ah men) XifaxanDNC PREGNANCY CATEGORY C Drug Classes Antibiotic Antidiarrheal Therapeutic Actions A structural analogue of rifampin; binds to bacterial DNA-dependent RNA polymerase and inhibits bacterial RNA…

Rifapentine (rif ah pin’ ten) Priftin PREGNANCY CATEGORY C Drug Classes Antibiotic Antituberculotic Therapeutic Actions Inhibits DNA-dependent RNA polymerase activity in susceptible strains of Mycobacterium tuberculosis, causing cell death. Indications…