Active substances

2,443 active substances of the UK medicines whose patient leaflet or SPC is on this site, from A to Z – with the number of medicines containing the substance alone or in a combination with other substances.

• Rucaparib 3 medicines: 3 alone
• Rucaparib camsylate 1 medicine: 1 alone
• Rufinamide 8 medicines: 8 alone
• Rupatadine 3 medicines: 3 alone
• Rurioctocog alfa pegol 7 medicines: 7 alone
• Ruxolitinib 17 medicines: 17 alone
• Sacituzumab govitecan 1 medicine: 1 alone
• Sacubitril 11 medicines: 11 in combination
• Safinamide 6 medicines: 6 alone
• Safinamide methanesulfonate 1 medicine: 1 alone
• Salbutamol 37 medicines: 35 alone · 2 in combination
• Salicylic acid 32 medicines: 14 alone · 18 in combination
• Salmeterol 77 medicines: 29 alone · 48 in combination
• Samarium (153Sm) lexidronam pentasodium 1 medicine: 1 alone
• Samarium [Sm-153] lexidronam pentasodium 1 medicine: 1 alone
• Sapropterin 6 medicines: 6 alone
• Saquinavir 1 medicine: 1 alone
• Sarilumab 4 medicines: 4 alone
• Sarolaner 2 medicines: 2 alone
• SARS-CoV-2 recombinant spike protein 1 medicine: 1 alone
• SAT2 Saudi Arabia ≥ 6 PD50* 1 medicine: 1 in combination
• Satralizumab 1 medicine: 1 alone
• Saxagliptin 11 medicines: 7 alone · 4 in combination
• Sebelipase alfa 1 medicine: 1 alone
• Secukinumab 6 medicines: 6 alone
• Seladelpar 1 medicine: 1 alone
• Selamectin 3 medicines: 3 alone
• selamectin, sarolaner 2 medicines: 2 alone
• Selegiline 4 medicines: 4 alone
• Selenium 6 medicines: 5 alone · 1 in combination
• Selexipag 16 medicines: 16 alone
• Selinexor 1 medicine: 1 alone
• Selpercatinib 3 medicines: 3 alone
• Selumetinib 4 medicines: 4 alone
• Semaglutide 23 medicines: 23 alone
• Senna 9 medicines: 7 alone · 2 in combination
• Senna leaf powdered 1 medicine: 1 in combination
• Sennosides 12 medicines: 12 alone
• Serplulimab 1 medicine: 1 alone
• Sertraline 12 medicines: 12 alone
• Setmelanotide 1 medicine: 1 alone
• Sevabertinib 1 medicine: 1 alone
• Sevelamer 7 medicines: 7 alone
• Sevelamer carbonate 5 medicines: 5 alone
• Sevoflurane 5 medicines: 5 alone
• Sildenafil 89 medicines: 89 alone
• Silodosin 3 medicines: 3 alone
• Siltuximab 3 medicines: 3 alone
• Simeprevir 1 medicine: 1 alone
• Simeticone 9 medicines: 2 alone · 7 in combination
• Simoctocog alfa 9 medicines: 9 alone
• Simvastatin 31 medicines: 26 alone · 5 in combination
• Single-stranded, 5’-capped messenger RNA produced using a cell-free in vitro transcription from the corresponding DNA templates, encoding the viral spike (S) protein of SARS-CoV-2 1 medicine: 1 alone
• Siponimod 3 medicines: 3 alone
• Siponimod fumaric acid 1 medicine: 1 alone
• Sirolimus 5 medicines: 5 alone
• Sitagliptin 78 medicines: 57 alone · 21 in combination
• Sitaxentan sodium 1 medicine: 1 alone
• Sodium acetate trihydrate 16 medicines: 3 alone · 13 in combination
• Sodium alginate 29 medicines: 6 alone · 23 in combination
• Sodium amidotrizoate 3 medicines: 1 alone · 2 in combination
• Sodium ascorbate 3 medicines: 3 in combination
• Sodium bicarbonate 93 medicines: 33 alone · 60 in combination
• Sodium carbonate 1 medicine: 1 in combination
• Sodium carbonate anhydrous 2 medicines: 2 in combination
• Sodium chloride 118 medicines: 62 alone · 56 in combination
• Sodium citrate 9 medicines: 7 alone · 2 in combination
• Sodium citrate dihydrate 2 medicines: 2 in combination
• Sodium clodronate 4 medicines: 4 alone
• Sodium cromoglicate 24 medicines: 24 alone
• Sodium dihydrogen phosphate 7 medicines: 1 alone · 6 in combination
• Sodium dihydrogen phosphate dihydrate 3 medicines: 1 alone · 2 in combination
• Sodium feredetate 2 medicines: 2 alone
• Sodium fluoride 22 medicines: 16 alone · 6 in combination
• Sodium fusidate 2 medicines: 2 alone
• Sodium glycerophosphate 2 medicines: 1 alone · 1 in combination
• Sodium glycerophosphate hydrate 2 medicines: 2 in combination
• Sodium hydroxide 1 medicine: 1 in combination
• Sodium iodide [I-131] 1 medicine: 1 alone
• Sodium lactate 1 medicine: 1 in combination
• Sodium lauryl ether sulfate 1 medicine: 1 in combination
• Sodium lauryl ether sulfo-succinate 1 medicine: 1 in combination
• Sodium molybdate 1 medicine: 1 in combination
• Sodium molybdate dihydrate 3 medicines: 3 in combination
• Sodium nitrite 2 medicines: 2 alone
• Sodium nitroprusside 1 medicine: 1 alone
• Sodium oxidronate 1 medicine: 1 alone
• Sodium oxybate 2 medicines: 2 alone
• Sodium pantothenate 1 medicine: 1 in combination
• Sodium phenylbutyrate 2 medicines: 2 alone
• Sodium phosphate 6 medicines: 2 alone · 4 in combination
• Sodium picosulfate 9 medicines: 8 alone · 1 in combination
• Sodium polystyrene sulfonate 1 medicine: 1 alone
• Sodium pyrophosphate decahydrate 2 medicines: 2 alone
• Sodium salicylate 1 medicine: 1 in combination
• Sodium selenite 3 medicines: 3 in combination
• Sodium selenite anhydrous 1 medicine: 1 in combination
• Sodium selenite pentahydrate 1 medicine: 1 in combination
• Sodium sulfate anhydrous 2 medicines: 2 in combination
• Sodium tetradecyl sulfate 4 medicines: 4 alone

Sources: the MHRA product information, the European Medicines Agency and the NHS Dictionary of Medicines and Devices (dm+d), NHS Business Services Authority.