Tick the adverse reactions characteristic for lidocaine:

Correct Answer: C

Rationale: The correct answer is C because lidocaine can cause adverse reactions such as hypotension, paresthesias, and convulsions due to its effects on the central nervous system. Extrapyramidal disorders can also occur. A: Agranulocytosis and B: Leucopenia are not characteristic adverse reactions of lidocaine. D: Bronchospasm and dyspepsia are not typically associated with lidocaine use. Therefore, the correct choice is C as it aligns with lidocaine's known adverse reactions.

Correct Answer: D

Rationale: The correct answer is D because oxytocin is indicated for all the mentioned conditions. A: Oxytocin helps induce labor and augment dysfunctional labor for early vaginal delivery. B: It can be used for incomplete abortion to help expel the remaining products of conception. C: Oxytocin is also used to control postpartum uterine hemorrhage by promoting uterine contractions. Therefore, all the options are valid indications for oxytocin use.

Correct Answer: D

Rationale: Rationale: The major synthetic estrogens are Dienestrol, Diethylstilbestrol, and Benzestrol, but not Estradiol. Estradiol is a natural estrogen produced by the ovaries. Therefore, D is the correct answer. Dienestrol, Diethylstilbestrol, and Benzestrol are synthetic estrogens used in hormone replacement therapy.

Correct Answer: A

Rationale: The correct answer is A. Metamizole use is associated with serious side effects such as agranulocytosis and aplastic anemia. Agranulocytosis is a severe decrease in white blood cells, leading to increased risk of infections. Aplastic anemia is a condition where the bone marrow does not produce enough blood cells. Choices B and C are incorrect as they are not known side effects of metamizole. Salicylism is associated with aspirin toxicity, while iatrogenic Cushing's syndrome is typically caused by prolonged use of glucocorticoids, not metamizole. Therefore, the correct choice is A as it accurately reflects the serious side effects of metamizole.

Correct Answer: A

Rationale: The correct answer is A: 18-24 hours. The half-life of a drug is the time it takes for half of the drug to be removed from the body. OKT-3 has a relatively short half-life, typically ranging from 18 to 24 hours. This means that after 18-24 hours, only half of the initial dose of OKT-3 will remain in the body. Choice B (25-35 minutes) is too short for a drug like OKT-3 which is used for immunosuppression and requires a longer duration of action. Choice C (4-16 hours) falls within the correct range but is not as specific as the 18-24 hours range. Choice D (21 days) is too long for OKT-3, as drugs with such long half-lives are typically not used for immunosuppression due to the difficulty in adjusting dosages.