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Methyldopa is a centrally acting alpha-2 adrenergic agonist that is considered safe for use in pregnancy to treat hypertension.
The correct answer is d. d) Methyldopa
Inhaled glucocorticoids can suppress the local immune response in the mouth and throat, making patients susceptible to oral fungal infections (oral candidiasis or thrush).
The correct answer is d. d) Glucocorticoid inhalation
Phenylephrine is a selective adrenergic agonist that causes vasoconstriction, thereby increasing blood pressure, which is beneficial for orthostatic hypotension.
The correct answer is c. c) Phenylephrine
For a chronic smoker diagnosed with COPD, the most critical first step in management is to cease smoking, as it is the primary cause of the disease and its progression.
The correct answer is d. d) Stop smoking
Inhaled corticosteroids are the preferred and safest controller therapy for moderate asthma in pregnant women, providing effective symptom control with minimal systemic absorption.
The correct answer is b. b) Inhaled corticosteroids
Metformin is contraindicated in patients with renal impairment because its accumulation can increase the risk of lactic acidosis, a severe metabolic complication.
The correct answer is a. a) Metformin
Beta-1 blockers are widely used for angina pectoris, hypertension, and myocardial infarction. While some beta-blockers are used for glaucoma (topically), it is not a primary systemic indication for beta-1 selective blockers in the same context as the other conditions.
The correct answer is a. a) Glaucoma
Sodium cromoglycate is a mast cell stabilizer that works by preventing the release of inflammatory mediators from mast cells, thus stabilizing their membranes.
The correct answer is d. d) Sodium cromoglycate
Pharmacodynamics is the branch of pharmacology that studies the effects of drugs on the body and their mechanisms of action.
The correct answer is c. c) What drugs do to the body
Non-selective agonists can also stimulate receptors in the heart, leading to cardiac side effects such as tachycardia.
The correct answer is b. b) Tachycardia
Subtype-selective receptor antagonists like tamsulosin, terazosin, and alfuzosin relax the smooth muscle in the prostate and bladder neck, improving urine flow in patients with benign prostatic hyperplasia (BPH).
The correct answer is a. a) Benign prostatic hyperplasia (BPH)
Cromolyn sodium (sodium cromoglycate) is a mast cell stabilizer that is considered a safe and effective prophylactic treatment for allergic asthma and rhinitis in children.
The correct answer is d. d) Cromolyn sodium
Formoterol is a long-acting agonist (LABA) that provides bronchodilation for more than 12 hours, making it suitable for controlling nocturnal asthma symptoms.
The correct answer is a. a) Formoterol
Abrupt discontinuation of clonidine, a centrally acting agonist, can lead to a sudden surge in sympathetic activity, resulting in severe rebound hypertension.
The correct answer is d. d) Rebound hypertension
Epinephrine (adrenaline) is the drug of choice for anaphylactic shock due to its potent (vasoconstriction), (cardiac stimulation), and (bronchodilation) effects, which counteract the severe symptoms.
The correct answer is d. d) Epinephrine
Tachycardia and tremors are common side effects of adrenergic agonists like salbutamol, which are used as bronchodilators in asthma, due to their systemic effects.
The correct answer is a. a) Salbutamol
Salmeterol is a long-acting selective agonist that primarily acts as a bronchodilator. It does not possess significant anti-inflammatory properties.
The correct answer is b. b) It is a long acting selective agonist bronchodilator
Salbutamol (Albuterol) is a short-acting agonist (SABA) that provides rapid bronchodilation and is the preferred drug for immediate relief of acute bronchospasm.
The correct answer is b. b) Salbutamol (Albuterol)
Pilocarpine is a muscarinic cholinergic agonist that is used in glaucoma to cause miosis and increase the outflow of aqueous humor, thereby reducing intraocular pressure.
The correct answer is c. c) Pilocarpine
Salbutamol is a short-acting agonist (SABA) that provides the fastest symptomatic relief for acute asthma symptoms like wheezing, chest tightness, and difficulty breathing.
The correct answer is c. c) Salbutamol
Thiazolidinediones (TZDs) are a class of oral antidiabetic agents that act by binding to and activating peroxisome proliferator-activated receptor-gamma (PPAR-) receptors, which improves insulin sensitivity.
The correct answer is c. c) Thiazolidinediones
Sodium cromoglycate is a mast cell stabilizer used for asthma prophylaxis, but it does not directly cause bronchodilation. Formoterol, Theophylline, and Ipratropium bromide are all bronchodilators.
The correct answer is a. a) Sodium cromoglycate.
Rising CO levels in acute severe asthma indicate impending respiratory failure. The immediate and appropriate action is to intensify bronchodilator therapy, typically with nebulized salbutamol and ipratropium.
The correct answer is b. b) Nebulized salbutamol + ipratropium
Metformin is an oral hypoglycemic agent that is contraindicated in patients with renal or hepatic disease due to the increased risk of lactic acidosis.
The correct answer is c. c) Metformin
Misoprostol is a prostaglandin E1 analog that is effective in healing nonsteroidal anti-inflammatory drug (NSAID)-induced gastric ulcers and can be used when H2 blockers are ineffective.
The correct answer is d. d) It heals nonsteroidal antiinflammatory drug induced gastric ulcer not responding to H2 blockers
Hyoscine (scopolamine) is an antimuscarinic drug well-known for its effectiveness in preventing and treating motion sickness and other vestibular disturbances.
The correct answer is c. c) Hyoscine (scopolamine)
Pirenzepin is a selective M1-cholinoblocker that was historically used to reduce gastric acid secretion.
The correct answer is d. d) Pirenzepin
Hypoglycemia (low blood sugar) is a common adverse effect of sulfonylureas because they stimulate insulin secretion from pancreatic beta cells, regardless of the current blood glucose level.
The correct answer is d. d) Hypoglycemia
Adrenaline (Epinephrine) is the drug of choice for severe anaphylactic shock due to its rapid and potent effects on multiple adrenergic receptors, which counteract the life-threatening symptoms.
The correct answer is d. d) Adrenaline (Epinephrine)
Type 1 Diabetes Mellitus is an autoimmune disease characterized by the destruction of pancreatic beta cells, leading to an absolute deficiency of insulin.
The correct answer is d. d) Type 1 Diabetes Mellitus
Metformin primarily acts by reducing hepatic glucose production and increasing glucose uptake and utilization in peripheral tissues, thereby improving insulin sensitivity.
The correct answer is a. a) Increasing glucose uptake and reducing hepatic glucose production
The chronic elevation of blood glucose levels in diabetes leads to the glycation of proteins, which is a major contributor to the development of microvascular complications such as retinopathy and peripheral neuropathy.
The correct answer is c. c) Glycation of proteins due to hyperglycemia
The blood-brain barrier is primarily composed of lipids, allowing lipid-soluble and unionized drugs to cross easily, while restricting the passage of polar, ionized, and large molecules.
The correct answer is b. b) Lipid-soluble and unionized
Codeine, an opioid cough suppressant, can cause bronchoconstriction in some individuals, particularly asthmatics, leading to a worsening of their asthma symptoms.
The correct answer is b. b) Codeine
Methylxanthines (e.g., theophylline) inhibit phosphodiesterase, antagonize adenosine receptors, and can cause intracellular calcium release. They do not inhibit leukotriene receptors.
The correct answer is b. b) Inhibit leucotrine receptor
Short-acting agonists (SABA) are the fastest-acting bronchodilators, providing rapid relief for acute bronchospasm.
The correct answer is b. b) SABA
Cimetidine, an H2 receptor antagonist, is known to cause reversible gynecomastia as a side effect due to its antiandrogenic properties.
The correct answer is b. b) Cimetidine
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This geography problem is solved step by step below, with detailed explanations to help you understand the method and arrive at the correct answer.