This list includes 31 Pills that start with I, from “Ibandronate” to “Ivermectin”. These entries cover mostly oral medicines, including common prescriptions, over‑the‑counter options, and some higher‑risk drugs. You’ll find quick facts about what each pill treats and why it’s commonly used.
Pills that start with I are a diverse set of generic and brand medications used across many medical fields, from bone health to infectious disease. Many have notable histories, such as ivermectin, which became widely known for its major role in treating parasitic infections globally.
Below you’ll find the table with Name, Primary use, Therapeutic class, Common side effects, Formulation, and Brand names.
Name: The official generic name of the pill; you use it to identify the active ingredient quickly.
Primary use: A short description of the main condition treated so you know why this medicine is prescribed.
Therapeutic class: The drug class groups medicines with similar action, helping you understand related treatments and alternatives.
Common side effects: Typical mild to moderate reactions listed so you can watch for expected effects and discuss concerns.
Formulation: Indicates oral forms such as tablets or capsules so you know how the medicine is usually taken.
Brand names: Common commercial names help you match generics to products you may see in pharmacies or prescriptions.
Pills that start with I
| Name | Generic name | Drug class | Common side effects |
|---|---|---|---|
| Ibuprofen | ibuprofen | NSAID (pain reliever) | stomach pain, heartburn, nausea, dizziness, headache |
| Imodium | loperamide | antidiarrheal | constipation, dizziness, nausea, drowsiness |
| Ibrutinib | ibrutinib | BTK inhibitor (cancer drug) | diarrhea, bleeding, fatigue, muscle/joint pain, infections |
| Imatinib | imatinib | tyrosine kinase inhibitor (cancer) | nausea, fluid retention, muscle cramps, rash, fatigue |
| Inderal | propranolol | beta blocker (blood pressure/heart) | fatigue, dizziness, slow heart rate, cold hands |
| Imdur | isosorbide mononitrate | nitrate vasodilator (angina) | headache, lightheadedness, flushing, low blood pressure |
| Isordil | isosorbide dinitrate | nitrate vasodilator (angina) | headache, lightheadedness, low blood pressure |
| Ivermectin | ivermectin | antiparasitic | nausea, diarrhea, dizziness, rash |
| Itraconazole | itraconazole | antifungal | nausea, headache, stomach upset, liver enzyme changes |
| Isoniazid | isoniazid | anti-tuberculosis | liver injury, peripheral neuropathy, nausea, rash |
| Indomethacin | indomethacin | NSAID (anti-inflammatory) | stomach pain, headache, dizziness, heartburn |
| Irbesartan | irbesartan | angiotensin receptor blocker (blood pressure) | dizziness, fatigue, high potassium, headache |
| Isradipine | isradipine | calcium channel blocker (blood pressure) | headache, dizziness, flushing, swelling |
| Isotretinoin | isotretinoin | retinoid (severe acne) | dry skin, chapped lips, birth defects, mood changes |
| Ivabradine | ivabradine | heart rate lowering agent | bradycardia, visual brightness, dizziness |
| Ivacaftor | ivacaftor | CFTR potentiator (cystic fibrosis) | headache, stomach pain, liver enzyme changes |
| Imipramine | imipramine | tricyclic antidepressant | dry mouth, drowsiness, constipation, blurred vision |
| Icosapent ethyl | icosapent ethyl | omega-3 fatty acid derivative (lipid lowering) | joint pain, upset stomach, increased bleeding |
| Isentress | raltegravir | integrase inhibitor (HIV) | nausea, headache, diarrhea, insomnia |
| Iressa | gefitinib | EGFR inhibitor (cancer drug) | diarrhea, rash, nausea, liver enzyme changes |
| Indapamide | indapamide | thiazide-like diuretic (blood pressure) | increased urination, low potassium, dizziness |
| Isocarboxazid | isocarboxazid | MAOI antidepressant | insomnia, dry mouth, dizziness, weight gain |
| Ibandronate | ibandronate | bisphosphonate (osteoporosis) | heartburn, stomach pain, muscle pain |
| Invega | paliperidone | antipsychotic | drowsiness, weight gain, tremor, increased prolactin |
| Isoptin | verapamil | calcium channel blocker (heart/blood pressure) | constipation, dizziness, low blood pressure, slow heart rate |
| Imitrex | sumatriptan | triptan (migraine) | tingling, dizziness, nausea, warm sensations |
| Iclusig | ponatinib | tyrosine kinase inhibitor (cancer) | hypertension, rash, abdominal pain, blood clots |
| Ibrance | palbociclib | CDK4/6 inhibitor (cancer) | low white cells, fatigue, nausea, hair thinning |
| Inlyta | axitinib | VEGFR inhibitor (cancer) | high blood pressure, diarrhea, fatigue, hand-foot syndrome |
| Iloperidone | iloperidone | antipsychotic | drowsiness, dizziness, dry mouth, weight gain |
| Invirase | saquinavir | protease inhibitor (HIV) | nausea, diarrhea, headache, elevated liver enzymes |
Descriptions
Ibuprofen
Oral tablet OTC pain reliever and fever reducer used for aches and inflammation; can cause stomach bleeding with long use and is unsafe late in pregnancy.
Imodium
Oral tablet/capsule for short-term relief of diarrhea; high doses can cause serious heart rhythm problems.
Ibrutinib
Oral capsule for certain blood cancers; increases bleeding and infection risk and may interact with many medicines.
Imatinib
Oral tablet for chronic myeloid leukemia and GIST; monitor liver function and for fluid build-up.
Inderal
Oral tablet for high blood pressure, tremor, migraine prevention; may worsen asthma and should not be stopped suddenly.
Imdur
Oral tablet to prevent angina (chest pain); causes headaches and must not be combined with PDE5 inhibitors (erectile dysfunction drugs).
Isordil
Oral tablet used to treat or prevent angina; avoid with sildenafil and monitor blood pressure.
Ivermectin
Oral tablet for certain parasitic infections; generally well tolerated but rare neurologic effects and not approved for viral infections.
Itraconazole
Oral capsule/tablet for fungal infections; many drug interactions and contraindicated in heart failure.
Isoniazid
Oral tablet used to treat or prevent tuberculosis; risk of hepatotoxicity and neuropathy—vitamin B6 (pyridoxine) often given.
Indomethacin
Oral capsule/tablet for pain and inflammation including gout; can cause GI bleeding and affect kidneys.
Irbesartan
Oral tablet for high blood pressure and diabetic kidney protection; contraindicated in pregnancy.
Isradipine
Oral capsule for high blood pressure; may cause reflex fast heartbeat and fluid retention.
Isotretinoin
Oral capsule for severe acne; highly teratogenic—strict pregnancy prevention required and liver monitoring recommended.
Ivabradine
Oral tablet to reduce heart rate in certain heart failure or angina patients; not for use with certain arrhythmias and interacts with strong CYP3A4 inhibitors.
Ivacaftor
Oral tablet/capsule for cystic fibrosis with specific mutations; requires liver monitoring and many drug interactions.
Imipramine
Oral tablet for depression and bedwetting; overdose can cause dangerous heart rhythm problems.
Icosapent ethyl
Oral capsule to lower very high triglycerides and reduce cardiovascular risk in select patients; may increase bleeding risk with blood thinners.
Isentress
Oral tablet for HIV treatment; generally well tolerated, rare muscle or liver effects possible.
Iressa
Oral tablet for EGFR-mutated non-small cell lung cancer; can rarely cause severe lung inflammation.
Indapamide
Oral tablet for high blood pressure; monitor electrolytes and kidney function.
Isocarboxazid
Oral tablet for depression; dangerous interactions with many drugs and certain foods (tyramine) can cause high blood pressure.
Ibandronate
Oral tablet to treat or prevent osteoporosis; can irritate the esophagus—take with water and remain upright.
Invega
Oral tablet for schizophrenia and schizoaffective disorder; watch for metabolic changes and movement disorders.
Isoptin
Oral tablet for high blood pressure, angina, and arrhythmias; may interact with many heart drugs.
Imitrex
Oral tablet for acute migraine attacks; contraindicated in certain heart disease and with MAOIs.
Iclusig
Oral tablet for some resistant leukemias; risk of serious blood clots and arterial occlusion.
Ibrance
Oral capsule for HR-positive breast cancer; causes neutropenia and requires blood count monitoring.
Inlyta
Oral tablet for advanced kidney cancer; causes hypertension and bleeding risk, with many interactions.
Iloperidone
Oral tablet for schizophrenia; can cause low blood pressure on standing and changes in heart rhythm.
Invirase
Oral capsule/tablet for HIV; many drug interactions and requires monitoring of liver function.