Nayzilam (generic brivaracetam) — Mechanism of Action Brivaracetam is a selective synaptic vesicle protein‑2A (SV2A) ligand. Binding: It competes with endogenous SV2A sites, reducing calcium‑triggered vesicle release and thus decreasing neuronal excitability. Potency: 3–4× higher affinity for SV2A than levetiracetam, translating into a shorter dose interval and potentially a lower risk of dose‑related adverse effects. … Read more
Afinitor Afinitor (temsirolimus) is a macrolide derivative of rapamycin and functions as a potent inhibitor of the mechanistic target of rapamycin (mTOR). It is indicated for several advanced solid‑tumor malignancies and is FDA‑approved for renal cell carcinoma (RCC) and certain breast cancers. This drug card provides a concise, evidence‑based overview suitable for medical students and … Read more
Advil Advil (ibuprofen) is a widely used non‑steroidal anti‑inflammatory drug (NSAID) that provides analgesia, antipyresis, and anti‑inflammation. Mechanism of Action Ibuprofen competitively inhibits the cyclo‑oxygenase (COX) enzymes, primarily COX‑1 and COX‑2, which convert arachidonic acid to prostaglandins. By reducing prostaglandin production, it diminishes pain signaling, inhibits fever by acting on the hypothalamic thermoregulatory center, and … Read more
Actemra Actemra (generic name tocilizumab) is a monoclonal antibody that selectively inhibits the interleukin‑6 (IL‑6) receptor, modulating inflammation in autoimmune disease. It is a cornerstone therapy for rheumatoid arthritis and other IL‑6‑mediated states. Mechanism of Action Blocks the IL‑6 receptor (IL‑6Rα): Prevents both classic and trans‑signaling pathways and downstream JAK/STAT activation. Reduces pro‑inflammatory cytokine cascade, … Read more
Acetylcysteine Mechanism of Action Acetylcysteine is a glutathione precursor and a disulfide‑bond reducer. Antidote for acetaminophen (paracetamol) overdose: It is deacetylated in the liver to produce N‑acetyl‑p‑cysteine, which supplies cysteine for glutathione synthesis. Glutathione conjugates hepatotoxic N‑acetyl‑p‑benzoquinone imine, allowing its safe excretion. Mucolytic activity: In mucus, disulfide bonds cross‑link mucin proteins. Acetylcysteine breaks these bonds, … Read more
Abiraterone Abiraterone (Abiraterone acetate) is a selective, irreversible inhibitor of the 17α‑hydroxylase/17,20‑lyase (CYP17) enzyme, used primarily for the management of metastatic castration‑resistant prostate cancer (mCRPC). — Mechanism of Action Inhibition of CYP17: Blocks 17α‑hydroxylase and 17,20‑lyase activities, halting production of androgens (testosterone, dihydrotestosterone) in the testes, adrenal glands, and prostate tumor tissue. Reduction of Androgenic … Read more
Actos Actos is the brand name for pioglitazone, a thiazolidinedione (TZD) antidiabetic drug that improves insulin sensitivity by acting as a peroxisome proliferator‑activated receptor‑γ (PPAR‑γ) agonist. Mechanism of Action PPAR‑γ Activation – Pioglitazone binds to the ligand‑binding domain of PPAR‑γ in adipose tissue, muscle, and liver, leading to transcriptional changes that ↑ GLUT‑4 expression → … Read more
Actemra Actemra (generic name tocilizumab) is a monoclonal antibody that selectively inhibits the interleukin‑6 (IL‑6) receptor, modulating inflammation in autoimmune disease. It is a cornerstone therapy for rheumatoid arthritis and other IL‑6‑mediated states. Mechanism of Action Blocks the IL‑6 receptor (IL‑6Rα): Prevents both classic and trans‑signaling pathways and downstream JAK/STAT activation. Reduces pro‑inflammatory cytokine cascade, … Read more
Acetylcysteine Mechanism of Action Acetylcysteine is a glutathione precursor and a disulfide‑bond reducer. Antidote for acetaminophen (paracetamol) overdose: It is deacetylated in the liver to produce N‑acetyl‑p‑cysteine, which supplies cysteine for glutathione synthesis. Glutathione conjugates hepatotoxic N‑acetyl‑p‑benzoquinone imine, allowing its safe excretion. Mucolytic activity: In mucus, disulfide bonds cross‑link mucin proteins. Acetylcysteine breaks these bonds, … Read more
Acetazolamide Mechanism of Action Carbonic anhydrase inhibitor (enzyme‑specific inhibition of CA II in proximal tubules). ↓Formation of hydrogen ions → ↓Na⁺, HCO₃⁻ reabsorption → increased urinary pH, volume, and chloride excretion. Reduces aqueous humor production by blocking CO₂ ↔ H₂O ↔ H⁺ + HCO₃⁻ conversion in ciliary epithelium, lowering intra‑ocular pressure. Decreases cerebrospinal fluid (CSF) … Read more