Letter R - Most commonly used

Reglan (Metoclopramide)
Metoclopramide increases muscle contractions in upper digestive tract

Relafen (Nabumetone)
Nabumetone is in a group of drugs called nonsteroidal anti-inflammatory drugs (NSAIDs)

Relenza (Zanamivir)
Zanamivir is an antiviral medication

Relpax (Eletriptan)
Eletriptan is a headache medicine

Remeron (Mirtazapine)
Mirtazapine is an antidepressant

Remicade (Infliximab)
Infliximab reduces the effects of a substance in the body that can cause inflammation

Remifentanil
Remifentanil is a narcotic (opioid) pain medicine

Reminyl (Galantamine)
Galantamine improves the function of nerve cells in the brain

Renagel (Sevelamer)
Sevelamer is a phosphate binder

Revatio (Sildenafil)
Sildenafil relaxes muscles and increases blood flow to particular areas of the body

Revex (Nalmefene)
Nalmefene reverses the effects of opioid (OH-pee-oid) medications, also called narcotics

ReVia (Naltrexone)
Naltrexone oral is an special narcotic drug that blocks the effects of other narcotic medicines and alcohol

Revlimid (Lenalidomide)
Lenalidomide affects the immune system

Reyataz (Atazanavir)
Atazanavir is an antiviral medication in a group of HIV medicines called protease (PRO-tee-ayz) inhibitors

Rebetol (Ribavirin)
Ribavirin is an antiviral medication

Robitussin (Guaifenesin)
Dextromethorphan is a cough suppressant

Rocaltrol (Calcitriol)
Calcitriol is vitamin D3

Rocuronium
Rocuronium is used to relax the muscles

Rogaine Extra Strength (Minoxidil Topical)
The exact way that minoxidil topical works is not known