- Ritalin
- ritonavir
- ritual
- Rituxan
- rituximab
- RK-0202
- RLS
- RMP-7
- RNA
- Ro 31-7453
- Ro 50-3821
- RO4929097
- rofecoxib
- Roman chamomile
- romidepsin
- romiplostim
- ropivacaine
- ropivacaine hydrochloride
- rosiglitazone
- rosiglitazone maleate
- rosuvastatin calcium
- Roswell Park regimen
- Rothmund-Thomson syndrome
- RPI.4610
- RPR 109881A