Cocaine intoxication appears by:

Correct Answer: D

Rationale: The correct answer is D because cocaine intoxication presents with a variety of symptoms including clouding of consciousness, lightness of body, feeling of flight, wave warmth, physical bliss, motionlessness, clear consciousness, improved mood, influx of physical and spiritual forces, locomotive and speech excitation, and reappraisal of personality. These symptoms collectively represent the typical effects of cocaine intoxication. Choices A, B, and C each only describe a subset of the symptoms and experiences associated with cocaine intoxication, whereas choice D encompasses all the possible manifestations. Therefore, the correct answer is D as it includes all the symptoms that can be observed during cocaine intoxication.

Correct Answer: A

Rationale: The correct answer is A: Radioactive phosphorus 32. Radioactive phosphorus 32 depresses erythrogenesis by inhibiting DNA synthesis in rapidly dividing cells like erythroblasts. Ferrous sulfate (B) is an iron supplement that promotes erythropoiesis. Molgramostim (C) is a granulocyte-macrophage colony-stimulating factor, which stimulates white blood cell production, not erythrogenesis. Folic acid (D) is essential for DNA synthesis and red blood cell production, so it would not depress erythrogenesis.

Correct Answer: C

Rationale: Rationale: C is the correct answer because cardiac glycoside-induced ventricular tachyarrhythmias are more common in patients with hypokalemia, not hyperkalemia. This is due to the increased sensitivity of the myocardium to glycosides in the setting of low potassium levels. A: Lidocaine is not the drug of choice for treating these arrhythmias; instead, antiarrhythmic medications like phenytoin or amiodarone are preferred. B: Digibind (Digoxin-specific antibody) is used in severe cases to reverse the effects of cardiac glycosides. D: Patients with heart failure or preexisting heart damage are at higher risk for developing these arrhythmias due to impaired cardiac function and increased susceptibility to glycoside toxicity.

Correct Answer: A

Rationale: Step 1: Dipyridamole is a phosphodiesterase inhibitor that increases cyclic adenosine monophosphate (cAMP), leading to coronary vasodilation. Step 2: Myotropic agents act directly on vascular smooth muscle to cause vasodilation. Step 3: Dipyridamole's mechanism fits the definition of a myotropic coronary dilator. Summary: Atenolol (C) is a beta-blocker that works by blocking beta-adrenergic receptors. Validol (B) is a menthol-based preparation for angina relief. Alinidine (D) is a selective I1-agonist used for hypertension, not as a coronary dilator.

Correct Answer: A

Rationale: The correct answer is A because dopamine in high doses primarily acts on alpha-adrenoreceptors, leading to peripheral vasoconstriction. This is known as the "pressor effect" of dopamine. Dopamine does not directly act on its own receptors (choice B) for vasodilation. While dopamine can also stimulate beta-1 adrenoreceptors (choice C) to enhance cardiac output, this is not the main effect in high doses. Choice D is incorrect because dopamine primarily influences alpha-adrenoreceptors, not all of the listed receptors.