In which of the following categories are ephedrine, tyramine and emphetamine classified________________?
Correct answer: C. Indirect acting sympathomimetics
- A. Anticholinesterases
- B. Alpha-adrenergic blocking agents
- C. Indirect acting sympathomimetics
- D. Direct acting sympathomimetics
Explanation
Ephedrine, tyramine, and amphetamine increase adrenergic activity mainly by releasing stored noradrenaline, so they are indirect-acting sympathomimetics. Direct agents instead stimulate adrenergic receptors themselves.
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