Which of the following could be used as an antidote for curare poisoning?

Correct Answer: A

Rationale: Neostigmine is an acetylcholinesterase inhibitor that increases acetylcholine levels reversing curare-induced paralysis.

Correct Answer: A

Rationale: Sympathetic block can be the most troublesome in spinal anaesthesia leading to hypotension and other complications.

Correct Answer: C

Rationale: Insomnia is a common early adverse effect of lithium therapy due to its impact on sleep patterns. Patients may experience difficulty falling asleep or staying asleep during the initial days of treatment. This side effect typically resolves as the body adjusts to the medication. Constipation, weight loss, hypertension, and edema are less commonly associated with lithium therapy in the early stages.

Correct Answer: C

Rationale: Enalapril is an ACE inhibitor with no significant anti-inflammatory action.

Correct Answer: C

Rationale: The correct answer is C: Cyclobenzaprine. Cyclobenzaprine is a centrally acting muscle relaxant commonly used to treat muscle spasticity in conditions like multiple sclerosis. It works by inhibiting nerve impulses to reduce muscle spasms. Neostigmine (A) is a cholinesterase inhibitor used for myasthenia gravis, not spasticity. Ropinirole (B) is a dopamine agonist used for Parkinson's disease and restless legs syndrome, not spasticity. Pyridostigmine (D) is also a cholinesterase inhibitor used for myasthenia gravis, not spasticity.