Promethazine

Promethazine Promethazine (brand names: Phenergan®, Banan) is a first‑generation phenothiazine antihistamine with antiemetic, sedative, and anticholinergic properties. It is widely used for allergy relief, nausea/vomiting, and procedural sedation. --- Mechanism…

Promacta

Promacta Promacta (eltrombopag) is an oral thrombopoietin receptor agonist (TPO‑RA) used to treat thrombocytopenia by stimulating megakaryocyte proliferation and platelet production. Mechanism of Action Binding: Eltrombopag is a non‑peptide small…

Prolia

Prolia Prolia (generic name: denosumab) is a fully human monoclonal antibody targeting RANK ligand (RANKL), which plays a pivotal role in osteoclast differentiation, function, and survival. It is widely used…

Progesterone

Progesterone Progesterone is a naturally occurring steroid hormone that plays a pivotal role in regulating the menstrual cycle, maintaining pregnancy, and modulating reproductive tract physiology. Mechanism of Action Receptor Binding:…

Prochlorperazine

Prochlorperazine Prochlorperazine is a typical antipsychotic (phenothiazine) with prominent antiemetic activity. It functions primarily through dopamine D₂ receptor antagonism and exhibits ancillary serotonin, histamine, and muscarinic blockade. Mechanism of Action…

Probuphine

Probuphine Probuphine is a subcutaneous, implantable formulation of buprenorphine approved by the FDA for the treatment of stable opioid dependence. The implant provides a continuous, low‑dose release of buprenorphine over…

ProAir HFA

ProAir HFA Mechanism of Action ProAir HFA delivers the short‑acting sympathomimetic bronchodilator albuterol (salbutamol) via a metered‑dose inhaler. Albuterol binds selectively to β₂‑adrenergic receptors on bronchial smooth‑muscle. Activation of the receptor stimulates…

Pristiq

Pristiq Pristiq (desvenlafaxine) is an FDA-approved serotonin‑norepinephrine reuptake inhibitor (SNRI) indicated for the treatment of major depressive disorder (MDD). It is the active, desmethyl metabolite of venlafaxine but possesses a…

Primidone

Primidone Primidone is a phenobarbital‑derived anti‑epileptic used for seizure control and essential tremor. It is a prodrug converted to its active metabolites — phenobarbital and phenylethylmalonamide (EPM). Mechanism of Action Primidone exerts…

Prilosec

Prilosec Prilosec (lansoprazole) is a proton pump inhibitor (PPI) widely used for acid‑related disorders. Mechanism of Action Selective irreversible inhibition of the H⁺/K⁺‑ATPase (gastric proton pump) in parietal cells. Blocks…