Which of the following is NOT an action of H1 receptor antagonist:

Correct Answer: D

Rationale: H1 receptor antagonists, also known as antihistamines, primarily work by blocking the effects of histamine in the body. Histamine is involved in allergic reactions, itching, and motion sickness. Therefore, H1 receptor antagonists are commonly used for the treatment of allergic reactions, relief of itching, and prophylaxis of motion sickness. They are also sometimes used for the common cold to alleviate symptoms such as runny nose and sneezing. However, H1 receptor antagonists are not typically used as the main treatment for asthma, as they are not as effective in addressing the underlying inflammation and bronchoconstriction that occur in asthma. Asthma is usually managed with medications such as bronchodilators and corticosteroids that target the specific inflammatory pathways involved in asthma.

Correct Answer: D

Rationale: Clopidogrel is a drug that has a therapeutic effect in preventing thromboembolic events. It is an antiplatelet agent that works by inhibiting platelet aggregation, thus reducing the risk of blood clot formation. Clopidogrel is commonly used in patients at risk for cardiovascular events such as heart attacks and strokes. Warfarin is an anticoagulant medication that also helps prevent blood clots, but it works by a different mechanism than clopidogrel. Amlodipine is a calcium channel blocker used to treat hypertension and angina, while nitroglycerine is a vasodilator used in the treatment of angina.

Correct Answer: A

Rationale: GTN patches deliver the drug transdermally, bypassing first-pass metabolism and providing systemic therapeutic action.

Correct Answer: A

Rationale: Stevens-Johnson syndrome is a severe and potentially life-threatening adverse reaction associated with the use of Furosemide, a loop diuretic. It is characterized by a severe skin reaction that can cause rashes, blisters, and mucous membrane involvement. Stevens-Johnson syndrome is considered a medical emergency and requires immediate discontinuation of the offending medication. Monitoring and management should be promptly initiated to prevent serious complications. Other side effects of Furosemide include electrolyte imbalances, ototoxicity, and dehydration, but Stevens-Johnson syndrome is a particularly serious adverse reaction that requires immediate attention.

Correct Answer: A

Rationale: Escitalopram, an SSRI, boosts serotonin, easing both anxiety and depression-shared neurochemistry (e.g., limbic dysregulation), per psychiatry. Calling it masked depression assumes unstated symptoms. Doctor's choice plus safety is true but less explanatory. Disorders don't always coexist-serotonin explains use, answering directly.