Drugs ( A to Z ) – Page 3 – Lambeth Health Press

Lorazepam

Generic Name: Lorazepam Common Brand Names: Ativan, Loraz, Temesta Introduction Lorazepam is a benzodiazepine with anxiolytic, sedative, hypnotic, anticonvulsant, and muscle-relaxant properties. It is commonly used for anxiety disorders, insomnia, and seizure management. It has a relatively intermediate duration of action compared to other benzodiazepines. Conditions of Use (Indications) 1. Anxiety Disorders: Short-term management of severe anxiety. 2. Insomnia: Particularly when associated with anxiety. 3. Seizures and Status Epilepticus: First-line agent for terminating status epilepticus. 4. Preoperative Sedation: Used to induce sedation and reduce anxiety prior to procedures. 5. Alcohol Withdrawal: To prevent or manage withdrawal symptoms, including seizures. Mechanism of Action Lorazepam enhances the effect of gamma-aminobutyric acid (GABA),

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Methotrexate

Generic Name: Methotrexate Common Brand Names: Trexall, Rheumatrex, Otrexup, Rasuvo Introduction Methotrexate is an antimetabolite and folate antagonist that is widely used in oncology and autoimmune diseases. It interferes with DNA synthesis, repair, and replication by inhibiting dihydrofolate reductase (DHFR). Conditions of Use (Indications) 1. Cancer: Treats various malignancies, including leukemia, lymphoma, breast cancer, and osteosarcoma. 2. Autoimmune Diseases: Rheumatoid arthritis, psoriasis, juvenile idiopathic arthritis. 3. Ectopic Pregnancy: Medical management to terminate pregnancy. Mechanism of Action Methotrexate inhibits DHFR, blocking the conversion of dihydrofolate to tetrahydrofolate, a necessary cofactor for purine and thymidylate synthesis. This disrupts DNA and RNA synthesis in rapidly dividing cells. At low doses, methotrexate exerts anti-inflammatory

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Metoprolol

Generic Name: Metoprolol Common Brand Names: Lopressor, Toprol XL, Betaloc Introduction Metoprolol is a selective beta-1 adrenergic receptor blocker used extensively in cardiovascular medicine. It reduces heart rate, myocardial contractility, and cardiac output, making it a cornerstone therapy for hypertension, ischemic heart disease, and certain types of arrhythmias. Conditions of Use (Indications) 1. Hypertension: First-line or adjunct therapy to control high blood pressure. 2.Ischemic Heart Disease: Management of angina pectoris to reduce myocardial oxygen demand. 3. Heart Failure (HFrEF): Improves survival and reduces hospitalizations in stable chronic heart failure. 4. Acute Myocardial Infarction (AMI): Reduces mortality and the risk of recurrent infarction. 5. Arrhythmias: Supraventricular tachycardia (SVT) and atrial fibrillation

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Naloxone

Generic Name: Naloxone Common Brand Names: Narcan, Evzio Introduction Naloxone is a pure opioid antagonist used to rapidly reverse opioid overdose. It is considered a life-saving drug and is often administered in emergency situations to restore breathing in patients with opioid-induced respiratory depression. Conditions of Use (Indications) 1. Opioid Overdose: Reversal of respiratory and central nervous system depression caused by opioids. 2. Opioid-Induced Respiratory Depression: In postoperative or therapeutic opioid use. 3. Adjunct in Diagnosing Opioid Addiction: To confirm opioid dependence (naloxone challenge test). Mechanism of Action Naloxone competitively binds to opioid receptors (mu, kappa, and delta) without activating them, effectively displacing opioids like morphine or fentanyl from these receptors.

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Naproxen

Generic Name: Naproxen Common Brand Names: Aleve, Naprosyn, Anaprox Introduction Naproxen is a nonsteroidal anti-inflammatory drug (NSAID) widely used for its analgesic, antipyretic, and anti-inflammatory properties. It is commonly prescribed for managing pain and inflammation in musculoskeletal conditions and other inflammatory disorders. Conditions of Use (Indications) 1. Pain Management: Mild to moderate pain, including headache, dental pain, and menstrual cramps (dysmenorrhea). 2. Inflammatory Conditions: Osteoarthritis, rheumatoid arthritis, ankylosing spondylitis. 3. Gout: Acute gout attacks. 4. Fever Reduction (Off-Label): In febrile illnesses when other antipyretics are unsuitable. Mechanism of Action Naproxen inhibits the cyclooxygenase (COX-1 and COX-2) enzymes, which are involved in the synthesis of prostaglandins. Prostaglandins mediate inflammation, pain, and

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Ondansetron

Generic Name: Ondansetron Common Brand Names: Zofran, Zuplenz Introduction Ondansetron is a selective serotonin 5-HT3 receptor antagonist used to prevent and treat nausea and vomiting associated with chemotherapy, radiation therapy, and postoperative recovery. Conditions of Use (Indications) 1. Chemotherapy-Induced Nausea and Vomiting (CINV): Effective for acute and delayed phases of CINV. 2. Radiation-Induced Nausea and Vomiting (RINV): Adjunct to radiotherapy. 3. Postoperative Nausea and Vomiting (PONV): Prevention and treatment. Mechanism of Action Ondansetron blocks serotonin (5-HT3) receptors located in the chemoreceptor trigger zone (CTZ) of the brain and the gastrointestinal tract. By inhibiting these receptors, ondansetron prevents the vomiting reflex initiated by emetogenic signals. Side Effects 1. Common Side Effects:

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Omeprazole

Generic Name: Omeprazole Common Brand Names: Prilosec, Losec Introduction Omeprazole is a proton pump inhibitor (PPI) used to treat conditions related to excessive stomach acid production. It is commonly prescribed for gastroesophageal reflux disease (GERD), peptic ulcers, and Zollinger-Ellison syndrome. Conditions of Use (Indications) Gastroesophageal Reflux Disease (GERD): Used to reduce acid reflux symptoms and heal esophageal damage caused by stomach acid. Peptic Ulcers: To treat and prevent duodenal and gastric ulcers, especially those caused by Helicobacter pylori infection (usually in combination with antibiotics). Zollinger-Ellison Syndrome: A rare condition characterized by excessive acid production, often treated with higher doses of omeprazole. Helicobacter pylori Eradication: Often used in combination with antibiotics

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Paracetamol

Generic Name: Paracetamol (Acetaminophen) Common Brand Names: Tylenol, Panadol, Anacin-3 Introduction Paracetamol (also known as acetaminophen) is a widely used analgesic and antipyretic medication. It is commonly used for pain relief and reducing fever. Conditions of Use (Indications) Pain Relief: Used to relieve mild to moderate pain, including headaches, toothaches, menstrual cramps, and musculoskeletal pain. Fever Reduction: Often used to reduce fever in various illnesses, including colds, flu, and infections. Osteoarthritis: Often used as a first-line treatment for pain management in osteoarthritis due to its effectiveness and safety profile. Mechanism of Action Paracetamol is believed to work by inhibiting the cyclooxygenase (COX) enzymes in the brain, which play a key

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Paroxetine

Generic Name: Paroxetine Common Brand Names: Paxil, Pexeva, Brisdelle Introduction Paroxetine is a selective serotonin reuptake inhibitor (SSRI) widely used for treating mood and anxiety disorders. It is particularly effective for major depressive disorder, generalized anxiety disorder, and post-traumatic stress disorder. Conditions of Use (Indications) 1. Major Depressive Disorder (MDD): First-line therapy. 2. Anxiety Disorders: Generalized anxiety disorder (GAD), social anxiety disorder (SAD), panic disorder. 3. Obsessive-Compulsive Disorder (OCD): Long-term management. 4. Post-Traumatic Stress Disorder (PTSD): FDA-approved for PTSD. 5. Premenstrual Dysphoric Disorder (PMDD): Effective symptom relief. Mechanism of Action Paroxetine inhibits the reuptake of serotonin (5-HT) at the presynaptic terminal, increasing serotonin levels in the synaptic cleft. Enhanced serotonin

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