Introduction Penicillins are one of the oldest and most widely used classes of antibiotics, belonging to the β-lactam family. They’re highly effective against Gram-positive bacteria and some Gram-negatives, depending on the type. Their mechanism centers on inhibiting bacterial cell wall synthesis, which leads to bacterial lysis and death. Penicillins remain a foundational topic for USMLE, … Read more
Introduction Lacosamide is a newer-generation antiepileptic drug (AED) used for the treatment of focal (partial) seizures and adjunctive therapy for generalized seizures. It has a novel mechanism, targeting slow inactivation of voltage-gated sodium channels, which differentiates it from older AEDs. It is well tolerated and commonly prescribed in the US for both adults and children. … Read more
Introduction Phenytoin is one of the oldest and most widely used antiepileptic drugs (AEDs), primarily for treating focal seizures and generalized tonic-clonic seizures. It has a well-known profile, acting on voltage-gated sodium channels to reduce high-frequency neuronal firing. Despite newer alternatives, phenytoin remains important, especially in emergency settings like status epilepticus (IV use). It’s a … Read more
Introduction Atypical antipsychotics, also known as second-generation antipsychotics (SGAs), are widely used in the treatment of schizophrenia, bipolar disorder, major depressive disorder (as adjuncts), and autism-related irritability. Compared to typical antipsychotics, they offer fewer extrapyramidal symptoms (EPS) and better control of negative symptoms of schizophrenia due to their dual action on dopamine and serotonin receptors. … Read more
Introduction Tricyclic antidepressants (TCAs) are one of the oldest classes of antidepressant medications. Although largely replaced by SSRIs due to their improved safety profiles, TCAs are still widely used for treatment-resistant depression, neuropathic pain, and other off-label conditions. They work by inhibiting the reuptake of norepinephrine and serotonin, thereby increasing the levels of these neurotransmitters … Read more
🔍 Introduction Atorvastatin is a widely used lipid-lowering agent that belongs to the class of HMG-CoA reductase inhibitors, commonly known as statins. It is one of the most prescribed drugs worldwide due to its effectiveness in lowering LDL cholesterol and reducing cardiovascular risk. It plays a major role in: Because of its clinical importance and … Read more
Introduction Methotrexate is a cornerstone drug in both anticancer chemotherapy and immunosuppressive therapy. Structurally, it is a folic acid antagonist and functions as an antimetabolite. It is widely used in: Due to its dual role in oncology and immunology, Methotrexate is a high-yield topic in exams like GPAT, NIPER, NEET-PG, NCLEX, and essential for PharmD, … Read more
Introduction Aspirin, also known as acetylsalicylic acid, is a widely used Non-Steroidal Anti-Inflammatory Drug (NSAID). It’s primarily known for its analgesic (pain-relieving), antipyretic (fever-reducing), anti-inflammatory, and antiplatelet actions. Belonging to the salicylate class, Aspirin is often prescribed for: Due to its clinical importance and frequent exam presence, understanding its mechanism of action is essential for … Read more
Coagulants are agents used to promote blood clotting in cases of bleeding disorders or excessive anticoagulation. They are used in various clinical settings including surgery, trauma, hemophilia, liver disease, and anticoagulant overdose. These drugs act by either supplying deficient clotting factors or enhancing the natural clotting process. This blog from Pharmacy Freak outlines the classification, … Read more
Tuberculosis (TB) is a chronic infectious disease caused primarily by Mycobacterium tuberculosis. It affects the lungs most commonly but can involve other organs. The treatment of TB requires prolonged multidrug therapy to ensure complete eradication and prevent resistance. Antitubercular drugs are classified according to their mechanism of action and their role in treatment regimens. This … Read more
