A 30-year-old man is brought to the clinic with a history of depression for the past 5 years with suicidal ideation and severe sleep disorders for the past 1 week. He is undergoing treatment with SSRI and MAOI, but the family members complain that his condition is becoming worse for the past 1 month. He is suspected with resistant depression and prescribed with imipramine. Which of the following mechanisms is most likely action of the above drug?

A 66-year-old man presents to the clinic for evaluation of a tremor. He has

noticed a progressively worsening tremor in his hands for the past 6 months.

The tremor is worse when he is resting and improves a little when he reaches

for an object or is using his hands. He has also noticed that it is harder to “get

started” when he stands up to walk. He takes several small, “shuffling” steps

before he can reach his full stride. He has no significant medical history and

takes only an aspirin a day. On examination you note that his face is fairly

expressionless, he has a pill-rolling-type tremor of his hands at rest and has

cogwheel rigidity of his arms. You diagnose him with Parkinson disease and

is prescribed with levodopa. Which of the following drugs is most likely prescribed with above drug?

A 69-year-old man presents to the Emergency Department with seizures for the past 20 minutes. He is given iv injection of lorazepam.

Which of the following mechanisms is most likely the actions of the above drug?

A 55-year-old man is brought to the Emergency Department after a motor vehicle accident. He had extensive crush and trauma related injuries on his left leg. He has an open fracture on his femur and tibia. He is immediately given morphine iv to control his pain.

Which of the following mechanisms best explains the actions of the above drug?

Which of the following classes of drug is used as a muscle relaxant, antiepileptic, anxiolytic, antidepressants, sedative, hypnotic, preanaesthetic and centrally acting analgesic (all-in-one drug)?