When starting a patient on antidysrhythmic therapy, the nurse will remember that which problem is a potential adverse effect of any antidysrhythmic drug?

Correct Answer: D

Rationale: The correct answer is D: Dysrhythmias. Antidysrhythmic drugs can paradoxically cause new or worsened dysrhythmias due to their mechanism of action on the heart's electrical conduction system. This can lead to potentially life-threatening arrhythmias. Deficiency of fat-soluble vitamins (choice A) is not a common adverse effect of antidysrhythmic drugs. Hyperkalemia (choice B) and heart failure (choice C) can be potential complications of some medications but are not the primary adverse effect of antidysrhythmics. Dysrhythmias (choice D) are the main concern when initiating antidysrhythmic therapy due to the drug's effects on cardiac conduction.

Correct Answer: C

Rationale: The correct answer is C: Assess weight. Before administering levothyroxine, the nurse should assess the patient's weight because levothyroxine dosage is often based on weight. This ensures accurate dosing and prevents under or overdosing. Assessing degree of numbness (A) and monitoring for intensified pain (B) are not directly related to levothyroxine administration. Assessing apical pulse (D) is important for monitoring thyroid function, but it is not a prerequisite before administering levothyroxine.

Correct Answer: C

Rationale: The correct answer is C: Vitamin K. Warfarin is an anticoagulant that works by inhibiting vitamin K-dependent clotting factors. Therefore, the antidote for Warfarin is vitamin K, as it helps restore the clotting factors to their normal activity levels. Vitamin D (choice A), Vitamin C (choice B), and Vitamin B (choice D) do not have a direct role in counteracting the effects of Warfarin and are thus incorrect choices.

Correct Answer: C

Rationale: The correct answer is C: Assess weight. Before administering levothyroxine, the nurse should assess the patient's weight as levothyroxine dosage is often based on weight to ensure proper dosing. Monitoring weight helps in determining the appropriate dosage and adjusting it as needed. Assessing the degree of numbness in an affected area (A) and monitoring for intensified pain (B) are not directly related to levothyroxine administration. Assessing the apical pulse (D) may be important in some cases, but weight assessment is specifically crucial for determining the correct dosage of levothyroxine.

Correct Answer: A

Rationale: The correct answer is A: Laxative. Senna is classified as a laxative due to its mechanism of action in stimulating bowel movements. Senna contains compounds that act on the colon to increase fluid secretion and promote peristalsis, aiding in relieving constipation. Choices B, C, and D are incorrect. B: Anti-Ulcer drugs like proton pump inhibitors or H2 blockers are used to treat ulcers by reducing stomach acid production. C: ACE inhibitors are used to treat high blood pressure by blocking an enzyme that constricts blood vessels. D: Benzodiazepines are a class of drugs used to treat anxiety, insomnia, and seizures by enhancing the effects of the neurotransmitter GABA.