Synthetic drugs structurally related to adrenaline are

Options

A. Amphetamines
B. Barbiturates
C. Analgesics
D. Hallucinogens

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for synthetic drugs that are structurally related to adrenaline. Adrenaline is a hormone and neurotransmitter that plays a crucial role in the body's response to stress.

2. **Identifying Adrenaline**: Adrenaline, also known as epinephrine, is produced by the adrenal medulla and is involved in the fight-or-flight response. It acts as a stimulant for the central nervous system (CNS).

3. **Exploring Synthetic Drugs**: We need to look for synthetic drugs that mimic or are structurally similar to adrenaline.

4. **Identifying Amphetamines**: The synthetic drug that is structurally related to adrenaline is **amphetamines**. Amphetamines are known as synthetic stimulants and are often referred to as anti-sleep drugs.

5. **Function of Amphetamines**: Like adrenaline, amphetamines stimulate the CNS, increasing the speed of communication between the brain and the body, similar to how adrenaline functions during stress.

6. **Conclusion**: Among the options provided, the correct answer is **amphetamines** as they are the synthetic drugs that are structurally related to adrenaline.

### Final Answer:
The synthetic drugs structurally related to adrenaline are **amphetamines**.

---