- Rabeprazole
- Racecadotril
- Raltegravir
- Ramelteon
- Ramipril
- Ranitidine
- Ranolazine
- Rapamycin (Sirolimus)
- Rasagiline
- Regadenoson
- Regorafenib
- Relugolix
- Remdesivir
- Repaglinide
- Ribociclib
- Riboflavin
- Rifaximin
- Riluzole
- Riociguat
- Risperidone
- Ritonavir
- Rivaroxaban
- Rivastigmine
- Roflumilast
- Ropinirole
- Ropivacaine
- Rosuvastatin
- Rotigotine
- Roxithromycin
- Rupatadine
- Ruxolitinib