List of medicines F | List of medicines G | List of medicines H | List of medicines J
| Ibuprofen | Ibuprofen is a non-steroidal anti-inflammatory drug (NSAID) | 
| Idoxuridine | Idoxuridine is an anti-herpesvirus antiviral drug | 
| Ifosfamide | Ifosfamide is a nitrogen mustard alkylating agent used in the treatment of cancer | 
| Imatinib | Imatinib is a drug used to treat certain types of cancer. | 
| Imidapril | Imidapril also known as Imidaprilum is an ACE inhibitor. | 
| Interferon Alfa-2A | Interferon alfa-2a is a protein, released in the body in response to viral infections | 
| Imipramine | Imipramine is an antidepressant medication, a tricyclic antidepressant | 
| Indapamide | Indapamide is a non-thiazide sulphonamide diuretic drug | 
| Indinavir | Indinavir is a protease inhibitor used as a component of highly active antiretroviral therapy (HAART) | 
| Indometacin | Indometacin or indomethacin is a non-steroidal anti-inflammatory drug | 
| Interferon Alfa-2B | Interferon ALPHA-2B is an antiviral drug | 
| Ipratropium Bromide | Ipratropium is an anticholinergic drug | 
| Irbesartan | Irbesartan is an angiotensin II receptor antagonist | 
| Irinotecan | Irinotecan is a drug used for the treatment of cancer | 
| Iron Polymaltose | Iron polymaltose is a water soluble, macro-molecular complex of iron (III) hydroxide and isomaltose | 
| Isoniazid | Isoniazid is the first-line antituberculosis medication | 
| Isoprenaline | Isoprenaline or isoproterenol is a sympathomimetic beta adrenergic agonist medication | 
| Isosorbide Dinitrate | Isosorbide dinitrate (ISDN) (also known as Dilatrate) is a nitrate used pharmacologically as a vasodilator | 
| Isosorbide Mononitrate | Isosorbide mononitrate is a drug used principally in the treatment of angina pectoris | 
| Isotretinoin | Isotretinoin is a medication used for the treatment of moderate to severe acne | 
| Isoxsuprine | Isoxsuprine, or Isoxsuprine hydrochloride, is a drug used as a vasodilator | 
| Itopride | Itopride is a prokinetic benzamide derivative which inhibit dopamine and have a gastrokinetic effect | 
| Itraconazole | Itraconazole is a triazole antifungal agent | 
| Ivermectin | Ivermectin is a broad-spectrum antiparasitic medication | 
| Indapamide + Perindopril | Perindopril/indapamide is a combination therapy for the treatment of Essential hypertension | 
| Isoniazid + Rifampicin | |
| Imipenem + cilastatin | Imipenem/ cilastatin is a broad spectrum beta-lactam antibiotic | 
| Imipramine + Diazepam | |
| Ivermectin + Albendazole | |
| Insulin | Insulin is a hormone that is central to regulating energy and glucose metabolism in the body. Insulin causes cells in the liver | 
| Iron Sucrose | Iron sucrose, a mineral iron formulation | 
| Ibandronate | Ibandronate is prescribed for the therapeutic management and prevention of osteoporosis | 
| Imiquimod | Imiquimod is prescribed for the treatment of actinic keratosis | 
| Infliximab | Infliximab, an anti-arthritic drug | 
| Insulin Lispro | Insulin Lispro is prescribed for the treatment of Type-1 diabetes in adults | 
| Idebenone | Idebenone is prescribed for the treatment and management of Alzheimer’s disease, Friedreich’s ataxia, & mitochondrial encephalomyopathy etc. | 
| Ispaghula husk | Ispaghula husk, a bulk-forming laxative | 
| Ivabradine | Ivabradine is indicated for the treatment of chronic stable angina pectoris | 
| Inositol | Inositol is prescribed for the treatment of panic disorders, polycystic ovarian disorders, schizophrenia, insomnia, dyslipidemia, lithium-related psoriasis, neuralgia, obsessive-compulsive disorders.. | 
| Inositol nicotinate | Inositol nicotinate is a synthetic form of niacin (vitamin B3) and Inositol | 
| Iodine | Iodine as oral and topical/cutaneous formulations is prescribed for the treatment of iodine deficiency disorders | 
| Ilaprazole | Ilaprazole, a novel proton pump inhibitor (PPI), is used for the treatment of gastroesophageal reflux disorders (GERD), dyspepsia and peptic ulcers. | 
| Indigo carmine | Indigo carmine solution is being employed in renal function tests | 
| Isradipine | Isradipine, a calcium-channel blocker | 
List of medicines F | List of medicines G | List of medicines H | List of medicines J