Phenazopyridine

Phenazopyridine Phenazopyridine (brand names: P‑PH Y, P‑Ph, A‑Phil, etc.) is a synthetic urinary analgesic and antispasmodic agent used primarily for symptomatic relief of lower urinary tract irritation. Mechanism of Action Phenazopyridine…

Percocet

Percocet Percocet is a combination analgesic containing oxycodone hydrochloride (an opioid) and acetaminophen (a non‑opioid antipyretic/analgesic). It is commonly prescribed for moderate to severe acute pain, especially post‑operative or injury‑related…

Pepcid

Pepcid Pepcid (famotidine) is a second‑generation histamine‑2 receptor antagonist (H₂RA) used primarily for acid‑related disorders. Mechanism of Action Famotidine competitively inhibits histamine binding to the H₂ receptors on gastric parietal…

Pentasa

Pentasa Pentasa (mesalamine) is the brand name for the 5‑aminosalicylic acid (5‑ASA) formulation marketed by Pfizer for the treatment of inflammatory bowel disease (IBD). The medication is available in oral…

pegcetacoplan ophthalmic

Pegcetacoplan Ophthalmic Pegcetacoplan ophthalmic is a PEG‑conjugated cyclic peptide that selectively inhibits complement component C3, and it is indicated for the treatment of geographic atrophy (GA) secondary to age‑related macular…

Paxlovid

Paxlovid Paxlovid is an oral, combination antiviral therapy consisting of the protease inhibitor nirmatrelvir (300 mg) and the pharmacokinetic enhancer ritonavir (100 mg). The drug is indicated for early treatment of outpatient…

Paxil

Paxil Paxil is the brand name for the selective serotonin reuptake inhibitor (SSRI) paroxetine. --- Mechanism of Action Selective inhibition of the serotonin transporter (SERT) in the presynaptic neuron, increasing…

Paroxetine

Paroxetine Paroxetine (generic) is a selective serotonin reuptake inhibitor (SSRI) with additional weak noradrenergic activity, commonly used for mood and anxiety disorders. Mechanism of Action Selective serotonin reuptake inhibition: Blocks…

Paragard

Paragard Mechanism of Action Paragard is a copper‑containing intrauterine device (IUD). Its contraceptive effect relies on: Sperm toxicity: Copper ions released into the uterine cavity are lethal to sperm, impairing…

Paracetamol

Paracetamol Mechanism of Action Paracetamol (acetaminophen) exerts its antipyretic and analgesic effects largely by Inhibiting central cyclooxygenase‑2 (COX‑2) activity, thereby reducing prostaglandin synthesis in the hypothalamus and spinal cord. Modulating…