Active Ingredients A to Z

Every branded generic we stock, organised by active ingredient, so you can find the affordable alternative to any big-name original. The brand changes; the active ingredient does not.

Famciclovir Famciclovir is an antiviral that treats cold sores, genital herpes and shingles. People with reduced kidney function need a lower dose, because the drug builds up in the body and can affect the nervous system. 1 medicine View Famciclovir Febuxostat Febuxostat lowers uric acid to prevent gout attacks, but it carries a boxed warning for a higher risk of cardiovascular death than allopurinol, especially in people with existing heart disease. 1 medicine View Febuxostat Fenofibrate Fenofibrate lowers triglycerides and treats mixed high cholesterol. Taken with a statin, it significantly raises the risk of serious muscle breakdown (rhabdomyolysis). 1 medicine View Fenofibrate Fenticonazole Fenticonazole is an imidazole antifungal applied to the skin or vagina to treat infections such as thrush and athlete's foot. See a doctor if symptoms don't improve within the expected course, since they may not be fungal. 2 medicines View Fenticonazole Fexofenadine Fexofenadine is a non-drowsy antihistamine for hay fever and hives. Take it with water rather than fruit juice, since apple, orange and grapefruit juice reduce how much of the drug your body absorbs. 1 medicine View Fexofenadine Finasteride Finasteride is a tablet that lowers DHT to treat male pattern hair loss and enlarged prostate; women who are or may be pregnant must never handle broken or crushed tablets, since contact can harm a male fetus. 3 medicines View Finasteride Flavoxate Flavoxate relaxes the bladder muscle to relieve urinary urgency and spasm-related pain. Avoid it if you have glaucoma or a blockage in your urinary or digestive tract, since it can make both worse. 1 medicine View Flavoxate Flecainide Flecainide is a class Ic antiarrhythmic used for certain fast heart rhythms. It is contraindicated after a heart attack or with structural heart disease, since it can itself trigger dangerous arrhythmias. 1 medicine View Flecainide Flibanserin Flibanserin treats low sexual desire in women, but it carries a boxed warning for severe drops in blood pressure and fainting when combined with alcohol or with certain other medicines, so alcohol must be avoided. 1 medicine View Flibanserin Fluconazole Fluconazole is an antifungal that blocks fungal cell-membrane production to treat infections like thrush and serious systemic fungal disease. It can affect heart rhythm and interacts with many other medicines, so your prescriber needs a full list of what you take. 1 medicine View Fluconazole Fludrocortisone Fludrocortisone is a synthetic mineralocorticoid that replaces a hormone the adrenal glands normally make, treating Addison's disease and similar conditions. Stopping it suddenly, or not raising the dose during illness or injury, can trigger a life-threatening adrenal crisis. 1 medicine View Fludrocortisone Flunarizine Flunarizine is a calcium channel blocker used to prevent migraine and treat vertigo. With long-term use it can cause depression or parkinsonism-like movement problems, especially in older adults, so treatment is reviewed regularly and stopped if these appear. 1 medicine View Flunarizine Fluocinolone Acetonide Fluocinolone acetonide is a topical corticosteroid used to treat eczema, dermatitis and other inflamed skin conditions. Prolonged use over large areas or under a dressing thins the skin and can suppress the adrenal glands, especially in children. 1 medicine View Fluocinolone Acetonide Fluorouracil Fluorouracil (5-FU) is a chemotherapy medicine that stops cancer cells building DNA; it also treats some skin lesions as a cream. People with a deficiency in the enzyme DPD can develop severe, sometimes fatal, toxicity from standard doses, so testing before treatment is recommended. 1 medicine View Fluorouracil Fluoxetine Fluoxetine is an SSRI antidepressant used for depression, OCD, bulimia and panic disorder. It has an unusually long half-life, so it stays in your body for weeks after your last dose, which affects how it interacts with other medicines. 3 medicines View Fluoxetine Flutamide Flutamide is a non-steroidal antiandrogen used with other treatments for prostate cancer. It can cause serious, sometimes fatal, liver injury, so liver function tests are required before and regularly during treatment. 1 medicine View Flutamide Fluticasone Fluticasone is a corticosteroid used as a nasal spray, inhaler or skin cream to calm inflammation in allergic rhinitis, asthma, COPD and eczema. High doses or long-term use, from any route, can suppress the body's own cortisol production, so treatment is stepped down gradually rather than stopped abruptly. 5 medicines View Fluticasone Fluticasone Propionate Fluticasone propionate is an inhaled corticosteroid that prevents asthma and COPD symptoms by reducing airway inflammation. It is a preventer, not a reliever, and rinsing your mouth after each dose helps prevent oral thrush. 1 medicine View Fluticasone Propionate Fluvoxamine Fluvoxamine is an SSRI antidepressant used for OCD and some anxiety disorders. In people under 25 it can increase suicidal thoughts, especially early in treatment, and it strongly interacts with other medicines including tizanidine and clozapine, so it must never be combined with an MAOI. 1 medicine View Fluvoxamine Formoterol Formoterol is a long-acting bronchodilator used for asthma and COPD. In asthma it must always be combined with an inhaled corticosteroid, never used alone, because LABA monotherapy increases the risk of severe attacks and asthma-related death. 2 medicines View Formoterol Furosemide Furosemide is a loop diuretic that makes the kidneys pass out extra salt and water, used for fluid overload in heart failure, liver and kidney disease. It can cause serious dehydration and dangerously low potassium, so blood tests are needed to check electrolytes and kidney function. 2 medicines View Furosemide Fusidic Acid Fusidic acid is a bacteriostatic antibiotic used as a cream for infected skin conditions such as impetigo, and orally or intravenously in some countries for deeper staphylococcal infections. Used alone or for too long, bacteria quickly become resistant, so courses are kept short and systemic use is always paired with a second antibiotic. 2 medicines View Fusidic Acid