By API Standards
- Rabeprazole
- Rabeprazole Sodium
- Racecadotril
- Ralfinamide
- Raltegravir
- Ramelteon
- Ramipril
- Ranitidine
- Ranolazine
- Rapamycin
- Rapidosept
- Rasagiline
- Rebamipide
- Regadenoson
- Regorafenib
- Relugolix
- Remdesivir
- Repaglinide
- Resmetirom
- Resperidone
- Ribociclib
- Riboflavin
- Rifampicin
- Rifamycin
- Rifapentine
- Rifaximin
- Rilpivirine
- Riluzole
- Riociguat
- Risedronate
- Risperidone
- Ritlecitinib
- Ritonavir
- Rivaroxaban
- Rivastigmine
- Rizatriptan
- Rocuronium Bromide
- Roflumilast
- Ropinirole
- Ropivacaine
- Rosuvastatin
- Rosuvastatin Acid
- Rotigotine
- Roxadustat
- Roxithromycin
- RPR 121057
- Rupatadine
- Rutoside
- Ruxolitinib