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.

Baclofen Baclofen is a muscle relaxant for spasticity that must never be stopped suddenly, since abrupt withdrawal can cause seizures and dangerous rebound spasticity. 2 medicines View Baclofen Baricitinib Baricitinib is a JAK inhibitor used for rheumatoid arthritis, atopic dermatitis, and other inflammatory conditions; it carries a class-wide warning for serious infections, blood clots, major cardiovascular events, and certain cancers, so regular monitoring is required. 1 medicine View Baricitinib Beclometasone Beclometasone is an inhaled corticosteroid that prevents asthma and COPD flare-ups by reducing airway inflammation. It is a preventer, not a reliever, and you must rinse your mouth after each dose to avoid oral thrush. 2 medicines View Beclometasone Bempedoic Acid Bempedoic acid is a cholesterol-lowering tablet that carries a risk of tendon rupture, most often in the Achilles, shoulder or biceps tendon. 1 medicine View Bempedoic Acid Betahistine Betahistine treats the vertigo of Meniere's disease but can worsen asthma or an active stomach ulcer, so both conditions need caution before starting. 1 medicine View Betahistine Betamethasone Betamethasone is a topical corticosteroid used for eczema, psoriasis and other inflamed skin conditions, not an antifungal. Prolonged or heavy use, especially under dressings or on the face, thins the skin and can suppress the body's own cortisol production. 6 medicines View Betamethasone Bethanechol Bethanechol is a cholinergic drug that stimulates bladder and gut muscles to treat urinary retention after surgery or nerve injury. It must never be used if there is a mechanical blockage in the urinary tract or bowel, since forcing contraction against an obstruction can cause rupture. 1 medicine View Bethanechol Bicalutamide Bicalutamide is a non-steroidal anti-androgen used alongside hormone therapy for prostate cancer. It can cause serious, occasionally fatal liver injury, so liver function tests are checked before and during treatment. 1 medicine View Bicalutamide Bilastine Bilastine is a non-sedating antihistamine for allergic rhinitis and hives. It must be taken away from food and fruit juice, which can cut its absorption by around a third. 1 medicine View Bilastine Bimatoprost Bimatoprost is a prostaglandin eye drop that lowers eye pressure in glaucoma and, in a lower strength, grows longer eyelashes. It can permanently darken the iris and the skin around the eyes. 5 medicines View Bimatoprost Bisoprolol Bisoprolol is a beta-blocker used for high blood pressure, angina and heart failure. It must never be stopped suddenly, since abrupt withdrawal can trigger rebound angina, a blood pressure surge or a heart attack. 2 medicines View Bisoprolol Brimonidine Brimonidine is an alpha-2 agonist eye drop that lowers pressure in glaucoma and ocular hypertension. It must never be given to infants or young children, since absorption through the eye can cause serious sedation and slowed breathing. 1 medicine View Brimonidine Brinzolamide Brinzolamide is a carbonic anhydrase inhibitor eye drop for glaucoma and ocular hypertension. As a sulfonamide, it should be avoided by anyone with a sulfa drug allergy. 1 medicine View Brinzolamide Bromhexine Bromhexine is a mucolytic that thins mucus so a productive cough can clear it more easily. Rare but serious skin reactions have been linked to it, so stop and seek care if a rash or mouth sores develop. 1 medicine View Bromhexine Bromocriptine Bromocriptine is a dopamine agonist used for high prolactin, Parkinson's disease and acromegaly. It must not be used to dry up breast milk after childbirth, since that use has caused strokes, seizures and heart attacks in new mothers. 1 medicine View Bromocriptine Budesonide Budesonide is a corticosteroid inhaled, sprayed or swallowed to calm inflammation in the lungs, nose or gut. After long-term use it must be tapered rather than stopped suddenly, since abrupt withdrawal can cause dangerously low cortisol levels. 5 medicines View Budesonide Bupropion Bupropion is an antidepressant and smoking-cessation aid that carries a dose-dependent seizure risk. It is contraindicated in people with a seizure disorder or an eating disorder. 5 medicines View Bupropion Buspirone Buspirone is a non-sedating anxiolytic for ongoing anxiety that takes two to four weeks to build its full effect. It must never be combined with an MAOI antidepressant, since together they can trigger a dangerous rise in blood pressure or serotonin syndrome. 1 medicine View Buspirone