This list includes 46 Pills that start with R, from “Rabeprazole” to “Rytary”. It focuses on oral tablets and capsules, covering generics and common brand names. You’ll find medicines used for digestion, pain, heart, brain, and mental health.
Pills that start with R are oral medications whose names begin with the letter R. Many are everyday prescriptions or over‑the‑counter drugs, and some names like “Ritalin” have broad cultural recognition.
Below you’ll find the table with Name, Primary use, Drug class, Common side effects, and Sources.
Name: This shows the pill’s most common name, including brand and generic labels so you can identify it reliably.
Primary use: A short description of what the medicine treats, helping you see if it matches the condition you’re researching.
Drug class: The therapeutic group indicates how the drug works and lets you compare it with related medicines quickly.
Common side effects: Lists three to six typical adverse effects so you know what to expect and when to ask about symptoms.
Sources: Links to authoritative drug databases and labels allow you to verify details or read full prescribing information.
Pills that start with R
| Pill Name | Generic name(s) | Drug class | Primary use |
|---|---|---|---|
| Rabeprazole | rabeprazole | Proton pump inhibitor (PPI) | Acid reflux, GERD, ulcers |
| Raloxifene | raloxifene | Selective estrogen receptor modulator (SERM) | Osteoporosis prevention and treatment |
| Ramipril | ramipril | ACE inhibitor | High blood pressure, heart failure |
| Ranolazine | ranolazine | Anti-anginal agent | Chronic chest pain (angina) |
| Rapaflo | silodosin | Alpha-blocker | Enlarged prostate (BPH) symptoms |
| Rapamune | sirolimus | mTOR inhibitor, immunosuppressant | Preventing organ transplant rejection |
| Rasagiline | rasagiline | MAO-B inhibitor | Parkinson’s disease |
| Rayaldee | calcifediol | Vitamin D analog | Hyperparathyroidism in chronic kidney disease |
| Razadyne | galantamine | Cholinesterase inhibitor | Dementia from Alzheimer’s disease |
| Reclipsen | desogestrel, ethinyl estradiol | Combination oral contraceptive | Pregnancy prevention |
| Reglan | metoclopramide | Dopamine antagonist, prokinetic agent | Nausea, gastroparesis, GERD |
| Regorafenib | regorafenib | Kinase inhibitor | Cancers (colorectal, liver, GIST) |
| Relafen | nabumetone | Nonsteroidal anti-inflammatory drug (NSAID) | Arthritis pain and inflammation |
| Relpax | eletriptan | Triptan, 5-HT receptor agonist | Acute migraine headache treatment |
| Remeron | mirtazapine | Tetracyclic antidepressant | Major depressive disorder |
| Renagel | sevelamer hydrochloride | Phosphate binder | High phosphate levels in dialysis patients |
| Renvela | sevelamer carbonate | Phosphate binder | High phosphate levels in dialysis patients |
| Repaglinide | repaglinide | Meglitinide | Type 2 diabetes |
| Requip | ropinirole | Dopamine agonist | Parkinson’s disease, restless legs syndrome |
| Restoril | temazepam | Benzodiazepine | Short-term treatment of insomnia |
| Rexulti | brexpiprazole | Atypical antipsychotic | Schizophrenia, major depressive disorder (adjunct) |
| Reyvow | lasmiditan | Ditan, 5-HT1F receptor agonist | Acute migraine headache treatment |
| Rifadin | rifampin | Antibiotic | Tuberculosis and other bacterial infections |
| Rifampin | rifampin | Antibiotic | Tuberculosis and other bacterial infections |
| Rifaximin | rifaximin | Antibiotic | Traveler’s diarrhea, IBS-D, hepatic encephalopathy |
| Rilutek | riluzole | Benzothiazole agent | ALS (amyotrophic lateral sclerosis) |
| Riluzole | riluzole | Benzothiazole agent | ALS (amyotrophic lateral sclerosis) |
| Riociguat | riociguat | Soluble guanylate cyclase (sGC) stimulator | Pulmonary hypertension (PAH) |
| Risperdal | risperidone | Atypical antipsychotic | Schizophrenia, bipolar disorder, autism-related irritability |
| Risperidone | risperidone | Atypical antipsychotic | Schizophrenia, bipolar disorder, autism-related irritability |
| Ritalin | methylphenidate | CNS stimulant | ADHD, narcolepsy |
| Ritonavir | ritonavir | Antiretroviral, CYP3A inhibitor | HIV infection treatment |
| Rivaroxaban | rivaroxaban | Factor Xa inhibitor, anticoagulant | Preventing and treating blood clots |
| Rizatriptan | rizatriptan | Triptan, 5-HT receptor agonist | Acute migraine headache treatment |
| Robaxin | methocarbamol | Muscle relaxant | Muscle spasms and pain |
| Robitussin CoughGels | dextromethorphan | Antitussive | Cough suppression |
| Rocaltrol | calcitriol | Vitamin D analog | Low calcium in kidney disease patients |
| Roflumilast | roflumilast | PDE4 inhibitor | Reducing COPD exacerbations |
| Rolaids | calcium carbonate, magnesium hydroxide | Antacid | Heartburn and indigestion relief |
| Ropinirole | ropinirole | Dopamine agonist | Parkinson’s disease, restless legs syndrome |
| Rosiglitazone | rosiglitazone | Thiazolidinedione | Type 2 diabetes |
| Rosuvastatin | rosuvastatin | Statin, HMG-CoA reductase inhibitor | Lowering high cholesterol |
| Rufinamide | rufinamide | Anticonvulsant, triazole derivative | Seizures associated with Lennox-Gastaut syndrome |
| Ruxolitinib | ruxolitinib | JAK inhibitor | Myelofibrosis, polycythemia vera, GVHD |
| Rybelsus | semaglutide | GLP-1 receptor agonist | Type 2 diabetes management |
| Rytary | carbidopa, levodopa | Decarboxylase inhibitor, dopamine precursor | Parkinson’s disease |
Descriptions
Rabeprazole
Capsule or tablet. Common side effects: headache, diarrhea, stomach pain, nausea. Long-term use may affect vitamin B12 and magnesium levels.
Raloxifene
Tablet. May cause hot flashes, leg cramps, swelling, joint pain. Increases the risk of blood clots, so discuss your risk factors with a doctor.
Ramipril
Capsule or tablet. Side effects include a persistent dry cough, dizziness, headache. Blood pressure and kidney function should be regularly monitored.
Ranolazine
Tablet. Common side effects: dizziness, headache, constipation, nausea. Can affect heart rhythm; an EKG may be needed before starting.
Rapaflo
Capsule. Can cause dizziness, headache, and a drop in blood pressure when standing. A key side effect is decreased or absent semen during ejaculation.
Rapamune
Tablet. Side effects: mouth sores, high cholesterol, diarrhea, acne, low blood counts. Requires regular blood tests to monitor drug levels and side effects.
Rasagiline
Tablet. May cause headache, joint pain, indigestion, dizziness. Avoid certain foods high in tyramine (aged cheeses, cured meats) to prevent high blood pressure.
Rayaldee
Capsule. Side effects include headache, nausea, diarrhea, increased urination. Blood levels of calcium, phosphorus, and PTH will be monitored.
Razadyne
Tablet or capsule. Common side effects: nausea, vomiting, diarrhea, dizziness, weight loss. Taking with food may help reduce stomach upset.
Reclipsen
Tablet. Side effects can include nausea, headache, breast tenderness, mood changes. Smoking increases the risk of serious cardiovascular side effects.
Reglan
Tablet. May cause drowsiness, restlessness, fatigue, dizziness. Long-term use can cause a serious movement disorder (tardive dyskinesia).
Regorafenib
Tablet. Side effects: fatigue, hand-foot skin reaction, diarrhea, high blood pressure. Liver function and blood pressure need close monitoring.
Relafen
Tablet. Can cause stomach upset, constipation, dizziness, headache. May increase risk of heart attack, stroke, and stomach bleeding.
Relpax
Tablet. Side effects include dizziness, drowsiness, chest tightness, nausea. Not for preventing migraines, only for treating an active attack.
Remeron
Tablet. Often causes drowsiness, increased appetite, and weight gain. Typically taken at bedtime due to its sedative effect.
Renagel
Tablet. May cause nausea, vomiting, constipation, or diarrhea. Must be taken with meals to be effective at binding dietary phosphate.
Renvela
Tablet. Side effects include nausea, vomiting, constipation, stomach pain. Should be taken with meals to control phosphorus levels.
Repaglinide
Tablet. Can cause low blood sugar (hypoglycemia), headache, and nausea. Take before meals; skip the dose if you skip a meal.
Requip
Tablet. Side effects include drowsiness, dizziness, nausea, low blood pressure. Can cause sudden sleepiness; use caution when driving.
Restoril
Capsule. May cause drowsiness, dizziness, headache, and a “hangover” effect. It is a controlled substance with a risk of dependence and addiction.
Rexulti
Tablet. Can cause weight gain, restlessness, dizziness, and tremors. Monitor for changes in metabolism (blood sugar, cholesterol) and mood.
Reyvow
Tablet. Causes significant dizziness and sleepiness; do not drive or operate machinery for at least 8 hours after taking.
Rifadin
Capsule. Can cause heartburn, nausea, headache. Colors body fluids (urine, sweat, tears) a harmless red-orange color; may stain contact lenses.
Rifampin
Capsule. Can cause heartburn, nausea, headache. Colors body fluids (urine, sweat, tears) a harmless red-orange color; may stain contact lenses.
Rifaximin
Tablet. Side effects include gas, headache, nausea, and stomach pain. It is poorly absorbed, so it works mainly in the gut.
Rilutek
Tablet. May cause nausea, weakness, dizziness, and decreased lung function. Requires regular liver function tests due to risk of liver injury.
Riluzole
Tablet. May cause nausea, weakness, dizziness, and decreased lung function. Requires regular liver function tests due to risk of liver injury.
Riociguat
Tablet. Can cause headache, dizziness, indigestion, low blood pressure. Cannot be used during pregnancy due to high risk of fetal harm.
Risperdal
Tablet. Side effects: drowsiness, weight gain, dizziness, drooling. Regular monitoring of weight, blood sugar, and cholesterol is important.
Risperidone
Tablet. Side effects: drowsiness, weight gain, dizziness, drooling. Regular monitoring of weight, blood sugar, and cholesterol is important.
Ritalin
Tablet. Side effects include nervousness, trouble sleeping, loss of appetite, headache. It is a controlled substance with potential for abuse and dependence.
Ritonavir
Tablet or capsule. Can cause diarrhea, nausea, weakness, taste changes. Interacts with many other medications, so a full medication review is critical.
Rivaroxaban
Tablet. Main side effect is an increased risk of bleeding. Report any signs of unusual or severe bleeding to your doctor immediately.
Rizatriptan
Tablet. May cause dizziness, sleepiness, dry mouth, and a sensation of chest tightness. Do not use to prevent migraines, only to treat them.
Robaxin
Tablet. Common side effects are drowsiness, dizziness, and lightheadedness. Avoid alcohol and other sedating drugs while taking.
Robitussin CoughGels
Capsule. May cause dizziness, drowsiness, nausea. High doses can be abused and lead to serious side effects; use only as directed.
Rocaltrol
Capsule. Side effects include headache, nausea, constipation. Regular blood tests are needed to monitor calcium and phosphorus levels.
Roflumilast
Tablet. Can cause diarrhea, weight loss, nausea, headache, and sleep problems. Not for treating sudden breathing problems; monitor for mood changes.
Rolaids
Chewable tablet. Side effects are uncommon but can include constipation or diarrhea. Do not use for more than two weeks without consulting a doctor.
Ropinirole
Tablet. Can cause drowsiness, dizziness, nausea, low blood pressure. May cause sudden sleepiness; use caution when driving or operating machinery.
Rosiglitazone
Tablet. May cause swelling, weight gain, and headache. Carries an increased risk of heart failure; report any shortness of breath or swelling.
Rosuvastatin
Tablet. Side effects include muscle pain, headache, nausea, and weakness. Report any unusual or severe muscle pain to your doctor immediately.
Rufinamide
Tablet. May cause sleepiness, dizziness, headache, fatigue, and nausea. Take with food to increase absorption; monitor for any serious skin reactions.
Ruxolitinib
Tablet. Can cause low blood counts (anemia, thrombocytopenia), bruising, dizziness. Requires regular blood count monitoring.
Rybelsus
Tablet. Main side effects are nausea, diarrhea, vomiting, and stomach pain. Must be taken on an empty stomach 30 minutes before any other food or drink.
Rytary
Capsule. May cause dizziness, nausea, headache, and uncontrolled movements (dyskinesia). Do not crush or chew the capsules.