The drug which does not have sedative effect but alongwith alcohol produces marked drowsiness is

Options

A. Barbiturate
B. Valium
C. Antihistamine
D. Marijuana

Answer

To solve the question regarding the drug that does not have a sedative effect but produces marked drowsiness when taken with alcohol, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a drug that does not inherently have sedative effects but can lead to drowsiness when combined with alcohol.

2. **Analyze the Options**:
- **Barbiturates**: These are sedative drugs that depress the central nervous system and can cause drowsiness on their own.
- **Valium**: This is a benzodiazepine that has sedative effects and can also cause drowsiness.
- **Antihistamines**: These drugs are primarily used to treat allergic reactions and do not have sedative effects on their own. However, when taken with alcohol, they can enhance drowsiness.
- **Marijuana**: This can have sedative effects and may also cause drowsiness.

3. **Identify the Correct Answer**: Based on the analysis, the drug that fits the criteria of not having a sedative effect on its own but can produce marked drowsiness when combined with alcohol is **Antihistamines**.

4. **Conclusion**: Therefore, the correct answer to the question is **Antihistamines**.

### Final Answer:
The drug which does not have sedative effect but along with alcohol produces marked drowsiness is **Antihistamines**.

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