Which of the following will not cause hallucinations at high doses ?

Options

A. Coke
B. Barbiturates
C. Datura extract
D. Extract of Atropa belladona

Answer

To solve the question "Which of the following will not cause hallucinations at high doses?", we need to analyze each option provided and determine whether they are known to cause hallucinations when taken in large quantities.

### Step-by-Step Solution:

1. **Understanding Hallucinations**:
- Hallucinations are sensory experiences that seem real but are created by the mind. They can affect all five senses: sight, sound, touch, taste, and smell.
- They can be caused by various factors including mental illness, certain medications, physical illnesses, and substance use.

2. **Analyzing the Options**:
- **Cocaine (Coke)**:
- Cocaine is a powerful stimulant drug. At high doses, it is known to cause hallucinations.
- **Barbiturates**:
- Barbiturates are central nervous system depressants used to treat anxiety and sleep disorders. They do not typically cause hallucinations at high doses; instead, they can lead to sedation or coma.
- **Datura Extract**:
- Datura is a plant known for its psychoactive properties. It can cause hallucinations when consumed in large amounts.
- **Atropa Belladonna Extract**:
- Atropa Belladonna, also known as deadly nightshade, contains tropane alkaloids that can cause hallucinations when taken in high doses.

3. **Conclusion**:
- Among the options provided, barbiturates are the only substance that does not cause hallucinations at high doses. Therefore, the correct answer is **B. Barbiturates**.

### Final Answer:
**B. Barbiturates**