Indicate D2 receptor agonist with antiparkinsonian activity:

Correct Answer: C

Rationale: Rationale: 1. Bromocriptine is a D2 receptor agonist. 2. Stimulation of D2 receptors helps alleviate Parkinson's symptoms. 3. Sinemet and Levodopa are dopamine precursors but not D2 agonists. 4. Selegiline is a monoamine oxidase inhibitor, not a D2 agonist. In summary, Bromocriptine directly activates D2 receptors, making it the correct choice for antiparkinsonian activity.

Correct Answer: C

Rationale: The correct answer is C: Chlorpromazine. Chlorpromazine is a phenothiazine aliphatic derivative because it belongs to the phenothiazine class of antipsychotic drugs and has an aliphatic side chain. Thiothixene (A) is a thioxanthene derivative, not a phenothiazine. Risperidone (B) is an atypical antipsychotic, not a phenothiazine. Clozapine (D) is a dibenzodiazepine derivative, not a phenothiazine. Therefore, Chlorpromazine is the only option that fits the criteria of being a phenothiazine aliphatic derivative.

Correct Answer: A

Rationale: The correct answer is A: Protriptyline. This tricyclic agent has the least sedative effect due to its higher potency and faster metabolism compared to other options. Protriptyline has minimal sedative properties, making it a preferred choice for patients who cannot tolerate sedation. Trazodone (B), Amitriptyline (C), and Mirtazapine (D) are known to cause sedation due to their antihistaminic and alpha-adrenergic blocking effects.

Correct Answer: B

Rationale: Step-by-step rationale for why answer B (Benzodiazepines) is correct: 1. Benzodiazepines are commonly used in the treatment of anxiety disorders due to their anxiolytic effects. 2. They work by enhancing the activity of GABA neurotransmitter, leading to calming and sedative effects. 3. Barbiturates (choice A) are less commonly used now due to high risk of dependence and overdose. 4. Lithium salts (choice C) are primarily used for bipolar disorder, not anxiety. 5. Phenothiazines (choice D) are more commonly used for psychotic disorders, not anxiety. Summary: Benzodiazepines are preferred for anxiety treatment due to their effectiveness and safety profile compared to other options like barbiturates, lithium salts, and phenothiazines.

Correct Answer: C

Rationale: Step-by-step rationale: 1. Hashish is a cannabis product made from the resin of the cannabis plant. 2. Cannabis plant contains psychoactive compounds such as THC, which is also present in hashish. 3. Heroin, ecstasy, and crack are not related to cannabis and have different chemical compositions and effects. 4. Therefore, the correct answer is C (Hashish) as it is directly related to cannabis. Summary: - Choice A (Heroin) is incorrect as it is an opioid, not related to cannabis. - Choice B (Ecstasy) is incorrect as it is a synthetic drug, not related to cannabis. - Choice D (Crack) is incorrect as it is a form of cocaine, not related to cannabis. - Only choice C (Hashish) is related to cannabis due to its origin from the cannabis plant and containing similar psychoactive compounds.