Pharmacology and Therapeutics

Methotrexate is a chemotherapy agent that works by inhibiting dihydrofolate reductase, which is essential for DNA synthesis. It is classified as an antimetabolite.

Succinylcholine is a depolarizing neuromuscular blocker that binds to nicotinic receptors at the neuromuscular junction, causing muscle paralysis. It is used for muscle relaxation during anesthesia and intubation. The question incorrectly describes it as 'slow acting' when it is actually rapid-acting, but the answer choice identifying it as a neuromuscular blocker is correct.

Nifedipine (misspelled as 'nifedepine') is a dihydropyridine calcium channel blocker that inhibits calcium influx into vascular smooth muscle and cardiac cells, causing vasodilation. Reserpine is an adrenergic inhibitor, hydralazine is a direct vasodilator, and metoprolol is a beta-blocker. Only nifedipine belongs to the calcium channel blocker class.

Cyclophosphamide is a nitrogen mustard derivative that works by cross-linking DNA, which classifies it as an alkylating agent used in chemotherapy.

P276 is a cyclin-dependent kinase inhibitor developed by Piramal Life Sciences, which underwent clinical trials for the treatment of head and neck cancer around 2008.

Analgesics are a class of drugs specifically designed to relieve pain without causing the loss of consciousness.

Antipyretics are medications specifically designed to reduce fever by lowering body temperature.

Acetylsalicylic acid is the chemical name for aspirin, which is widely used as a pain reliever, anti-inflammatory, and fever reducer.

Metanil yellow is toxic and carcinogenic

Bowel obstruction is a obstruction of the intestines, preventing the normal transit of the products of digestion. It is common and is usually managed medically using subcutaneous medication given via a syringe driver.

This option is correct because endorphins are produced during the time of physical/emotional stress for example: child birth, etc.

Magnesium citrate, a magnesium salt of citric acid, is a chemical agent used medicinally as a saline laxative and to completely empty the bowel prior to a major surgery or colonoscopy.

Rauwolfia serpentina, also known as Sarpagandha, contains alkaloids like reserpine which are used to treat hypertension (high blood pressure).

The oil extracted from the seeds of the Chaulmoogra tree (Hydnocarpus wightianus) has been used historically as a treatment for leprosy.

Antacids are substances that neutralize excess stomach acid, which is the primary cause of indigestion. Antiseptics prevent infection, and analgesics are painkillers.