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.

• Panobinostat 3 medicines: 3 alone
• Pantoprazole 13 medicines: 13 alone
• Pantothenic acid 1 medicine: 1 in combination
• Para-aminosalicylic acid 1 medicine: 1 alone
• Paracetamol 316 medicines: 148 alone · 168 in combination
• Parathyroid hormone 6 medicines: 6 alone
• Parecoxib 6 medicines: 6 alone
• Paricalcitol 2 medicines: 2 alone
• Paroxetine 14 medicines: 14 alone
• Pasireotide 8 medicines: 8 alone
• Passion flower extract 1 medicine: 1 in combination
• Patiromer calcium 2 medicines: 2 alone
• Patiromer sorbitex calcium 1 medicine: 1 alone
• Patisiran 2 medicines: 2 alone
• Pazopanib 4 medicines: 4 alone
• * PD50 – 50% protective dose in cattle as described in Ph. Eur. monograph 0063. 1 medicine: 1 in combination
• Peanut protein (as defatted powder of Arachis hypogaea L., semen [peanuts]) 4 medicines: 4 alone
• Pegaptanib 1 medicine: 1 alone
• Pegaspargase 3 medicines: 3 alone
• Pegbovigrastim 1 medicine: 1 alone
• Pegcetacoplan 1 medicine: 1 alone
• Pegfilgrastim 16 medicines: 16 alone
• Peginterferon alfa-2a 4 medicines: 4 alone
• Peginterferon alfa-2b 2 medicines: 2 alone
• Peginterferon beta-1a 4 medicines: 4 alone
• Pegloticase 1 medicine: 1 alone
• Pegunigalsidase alfa 1 medicine: 1 alone
• Pegvaliase 1 medicine: 1 alone
• Pegvisomant 4 medicines: 4 alone
• Pegzilarginase 1 medicine: 1 alone
• Pembrolizumab 1 medicine: 1 alone
• Pemetrexed 44 medicines: 44 alone
• Pemetrexed diacid monohydrate 1 medicine: 1 alone
• Pemetrexed disodium hemipentahydrate 4 medicines: 4 alone
• Pemetrexed ditromethamine 1 medicine: 1 alone
• Pemigatinib 3 medicines: 3 alone
• Penicillamine 6 medicines: 6 alone
• Pentamidine 2 medicines: 2 alone
• Pentazocine 5 medicines: 5 alone
• Pentetic acid 1 medicine: 1 alone
• Pentetreotide 1 medicine: 1 in combination
• Pentosan polysulfate sodium 1 medicine: 1 alone
• Pentostatin 1 medicine: 1 alone
• Pentoxifylline 2 medicines: 2 alone
• Peppermint 4 medicines: 4 alone
• Peppermint oil 5 medicines: 1 alone · 4 in combination
• Peramivir 1 medicine: 1 alone
• Perampanel 35 medicines: 35 alone
• Perflutren 2 medicines: 2 alone
• Perflutren-containing albumin microspheres 1 medicine: 1 alone
• Perflutren-containing lipid microspheres 1 medicine: 1 alone
• Pericyazine 4 medicines: 4 alone
• Perindopril arginine 10 medicines: 7 alone · 3 in combination
• Perindopril erbumine 6 medicines: 6 alone
• Permethrin 3 medicines: 3 alone
• Pertuzumab 4 medicines: 2 alone · 2 in combination
• Peru Balsam 9 medicines: 9 in combination
• Pethidine 5 medicines: 5 alone
• Phenazone 1 medicine: 1 in combination
• Phenelzine 1 medicine: 1 alone
• Phenindione 3 medicines: 3 alone
• Phenobarbital 19 medicines: 19 alone
• Phenobarbital sodium 4 medicines: 4 alone
• Phenol 7 medicines: 3 alone · 4 in combination
• Phenol liquefied 1 medicine: 1 in combination
• Phenolphthalein 1 medicine: 1 in combination
• Phenoxybenzamine 1 medicine: 1 alone
• Phenoxyethanol 2 medicines: 2 in combination
• Phenoxymethylpenicillin 28 medicines: 28 alone
• Phentolamine 1 medicine: 1 alone
• Phenylbutazone 2 medicines: 2 alone
• Phenylephrine 20 medicines: 9 alone · 11 in combination
• Phenylephrine hydrochloride 64 medicines: 26 alone · 38 in combination
• Phenylethyl alcohol 1 medicine: 1 in combination
• Phenytoin 2 medicines: 2 alone
• Phenytoin sodium 29 medicines: 29 alone
• Pholcodine 13 medicines: 11 alone · 2 in combination
• Phosphorus 1 medicine: 1 in combination
• Phytomenadione 8 medicines: 6 alone · 2 in combination
• Pibrentasvir 2 medicines: 2 in combination
• Piflufolastat [F-18] 2 medicines: 2 alone
• Pilocarpine 9 medicines: 9 alone
• Pimecrolimus 2 medicines: 2 alone
• Pimozide 3 medicines: 3 alone
• Pindolol 1 medicine: 1 alone
• Pinene 2 medicines: 2 in combination
• Pioglitazone 47 medicines: 41 alone · 6 in combination
• Piperacillin 7 medicines: 7 in combination
• Piperaquine tetraphosphate, Artenimol 1 medicine: 1 alone
• Piracetam 4 medicines: 4 alone
• Pirfenidone 14 medicines: 14 alone
• Pirlimycin 1 medicine: 1 alone
• Piroxicam 13 medicines: 13 alone
• Pirtobrutinib 2 medicines: 2 alone
• Pitolisant 6 medicines: 6 alone
• Pivmecillinam 4 medicines: 4 alone
• Pixantrone 1 medicine: 1 alone
• Pixantrone dimaleate 1 medicine: 1 alone
• Pizotifen 8 medicines: 8 alone
• Plerixafor 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.