- R C
- R-Salbutamol
- R-Tannamine
- R-Tannamine Pediatric
- R-Tannate
- R-Tannate Pediatric containing Chlorpheniramine Tannate, Phenylephrine Tannate, and Pyrilamine Tannate
- R-Tannate containing Chlorpheniramine Tannate, Phenylephrine Tannate, and Pyrilamine Tannate
- R.O.-Dexasone
- RA
- RCF
- RID
- RMS
- RMS Uniserts
- RTCA
- RU-486
- Rabeprazole
- Rabies Immune Globulin
- Rabies Vaccine
- Racemethionine
- Radiostol Forte
- Rafton
- Raloxifene
- Raltitrexed For Colorectal Cancer
- Ramelteon
- Ramipril
- Ramses Contraceptive Foam
- Ramses Crystal Clear Gel
- Ranitidine
- Ranitidine Bismuth Citrate
- Ranitidine Hydrochloride Injection
- Rapamune
- Rapamycin
- Rapolyte
- Raptiva
| - Rasburicase
- Raudixin
- Rauval
- Rauverid
- Rauwolfia Alkaloids
- Rauwolfia Alkaloids and Thiazide Diuretics
- Rauzide
- Ray Block
- Razadyne
- Razadyne ER
- Razadyne(formerly available as Reminyl)
- ReVia
- Reabilan
- Reabilan HN
- Reactine
- Rebetol
- Rebif
- Recombinate
- Recombivax HB
- Recombivax HB Dialysis Formulation
- Rectasol-HC
- Rectocort
- Rectovalone
- Rederm
- Redutemp
- Reese's Pinworm
- Reese's Pinworm Caplets
- Reese's Pinworm Medicine
- Reglan
- Reglan Syrup
- Regonol
- Regranex
- Regroton
| - Regular (Concentrated) Iletin II, U-500
- Regular Iletin II
- Regular Insulin
- Regular Strength Ascriptin
- Reguloid Natural
- Reguloid Natural Sugar Free
- Reguloid Orange
- Reguloid Orange Sugar Free
- Rehydralyte
- Relafen
- Relaxadon
- Relaxazone
- Relefact TRH
- Relenza
- Relief Eye Drops for Red Eyes
- Relisorm
- Relpax
- Remeron
- Remeron SolTab
- Remicade
- Remodulin
- Remular
- Remular-S
- Renagel
- Renedil
- Renese
- Renova
- Rentamine Pediatric
- ReoPro
- Repaglinide
- Repan
- Replete
- Replete with Fiber
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