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Medicines Beginning With P
42 medicines in the Drug Guide begin with the letter P. Every name links to a plain-language page covering what the medicine is for, its common side effects, its major cautions and — for most — a kidney note.
A B C D E F G H I K L M N O P Q R S T U V W Z
| Medicine | Brand names | Used for |
|---|---|---|
| Paliperidone | Invega | Schizophrenia; Schizoaffective disorder |
| Pancrelipase | Creon, Zenpep | Replacing digestive enzymes in chronic pancreatitis; Replacing enzymes in cystic fibrosis and after pancreas surgery |
| Pantoprazole | Protonix | Acid reflux and heartburn (GERD); Stomach and intestinal ulcers |
| Paricalcitol | Zemplar | Overactive parathyroid glands in chronic kidney disease; Overactive parathyroid glands in dialysis patients |
| Paroxetine | Paxil | Depression; Panic disorder |
| Patiromer | Veltassa | High blood potassium in chronic kidney disease; High blood potassium in heart failure patients on protective heart medicines |
| Penicillin G | Pfizerpen | Syphilis; Severe strep infections (hospital) |
| Penicillin V | Pen-Vee K | Strep throat; Skin infections |
| Perampanel | Fycompa | Seizure disorders (focal seizures); Generalized tonic-clonic seizures, in combination treatment |
| Perindopril | Aceon | High blood pressure; Stable coronary artery disease |
| Permethrin | Nix, Elimite | Head lice; Scabies |
| Phenelzine | Nardil | Depression that has not responded to other treatments; Depression with atypical features, on specialist care |
| Phenobarbital | Luminal | Seizure disorders; Severe alcohol and sedative withdrawal (hospital) |
| Phentermine | Adipex-P, Lomaira | Short-term weight management in obesity; Short-term appetite suppression combined with diet and activity |
| Phenylephrine | Sudafed PE (oral form) | Nasal congestion (nasal spray form); Raising blood pressure in hospital (injection) |
| Phenytoin | Dilantin | Seizure disorders; Prolonged seizures in hospital (related form, fosphenytoin) |
| Phytonadione | Mephyton, Vitamin K1 | Reversing warfarin effect when bleeding or before urgent procedures; Preventing bleeding in newborns (injection at birth) |
| Pioglitazone | Actos | Type 2 diabetes; Fatty liver disease with diabetes, on specialist advice |
| Piperacillin-tazobactam | Zosyn | Serious hospital infections of the lungs, abdomen, and skin; Infections in people with low white blood cell counts |
| Pitavastatin | Livalo | High cholesterol; High triglycerides as part of mixed lipid problems |
| Polyethylene glycol | MiraLAX, GlycoLax | Constipation; Preparing the bowel before colonoscopy (higher-volume preparations) |
| Posaconazole | Noxafil | Preventing invasive fungal infections in people with weak immune systems; Treating serious mold and yeast infections |
| Potassium chloride | Klor-Con, K-Dur | Treating low blood potassium; Preventing low potassium in patients on water pills |
| Pramipexole | Mirapex | Parkinson disease; Restless legs syndrome |
| Prasugrel | Effient | After stent placement for a heart attack; After stent placement for blocked heart arteries treated with angioplasty |
| Pravastatin | Pravachol | High cholesterol; Reducing risk of heart attack and stroke |
| Praziquantel | Biltricide | Schistosomiasis (a parasite infection from contaminated water); Certain tapeworm and fluke infections |
| Prednisolone | Orapred, Prelone | Allergic reactions; Asthma flare-ups, especially in children |
| Prednisone | Deltasone | Allergic reactions; Asthma and COPD flare-ups |
| Pregabalin | Lyrica | Nerve pain from diabetes and after shingles; Fibromyalgia |
| Primidone | Mysoline | Seizure disorders; Essential tremor |
| Probenecid | Probalan | Preventing gout attacks by helping the kidneys release uric acid; Boosting levels of penicillin antibiotics (older use) |
| Prochlorperazine | Compazine | Severe nausea and vomiting; Migraine-associated nausea |
| Progesterone | Prometrium | Protecting the womb lining during estrogen therapy; Preventing preterm birth in selected patients (specific products) |
| Promethazine | Phenergan | Nausea and vomiting; Motion sickness |
| Propafenone | Rythmol | Atrial fibrillation; Other fast heart rhythms in people without structural heart disease |
| Propranolol | Inderal | High blood pressure; Tremor |
| Propylthiouracil | PTU | Overactive thyroid (hyperthyroidism); Graves disease, including early in pregnancy |
| Pseudoephedrine | Sudafed | Nasal and sinus congestion from colds; Nasal congestion from allergies |
| Psyllium | Metamucil | Constipation; Mild cholesterol lowering as part of diet |
| Pyrazinamide | Tuberculosis, in the first phase of combination treatment; Shortening TB treatment as part of standard regimens | |
| Pyridostigmine | Mestinon | Myasthenia gravis; Reversing certain anesthesia muscle blockers (hospital, related use) |
Please note: This page is a patient-education summary, not medical advice, and it deliberately contains no doses. Medicines affect everyone differently — always follow your own prescription and talk to your doctor or pharmacist before starting, stopping or changing any medicine.