Which of the following statement is incorrect for opioid drugs ?

Options

A. They bind to specific opioid receptors present in our brain / VNS only .
B. It includes heroin , commonly called smack , and is diacetylmorphine
C. It is white , odourless , bitter crystalline compound .
D. It is extracted from the latex of poppy plant papaver somniferum .

Answer

To determine which statement is incorrect regarding opioid drugs, we will analyze the provided options step by step.

### Step-by-Step Solution

1. **Understanding Opioid Drugs**:
- Opioid drugs are substances that interact with opioid receptors in the brain to produce effects such as pain relief, euphoria, and sedation. They can be derived from natural sources or synthesized.

2. **Source of Opioids**:
- Opioids, specifically opiate drugs, are derived from opium, which is obtained from the dried latex of the opium poppy plant (Papaver somniferum). The latex is extracted from the unripe seed pods of the plant.

3. **Characteristics of Opioids**:
- Common opiate drugs include heroin (also known as diacetylmorphine), which is a potent opioid. It is typically a white, odorless, bitter crystalline compound.

4. **Analyzing the Statements**:
- **Option 1**: "They bind to a specific opioid receptor present in our brain or VNS only."
- This statement is incorrect. Opioid receptors are not limited to the brain or the ventral nervous system (VNS); they are distributed throughout the body, including in the spinal cord and peripheral tissues.

- **Option 2**: "It includes heroin."
- This statement is correct. Heroin is indeed an opiate drug derived from opium.

- **Option 3**: "Extracting latex of poppy plants, Papaver somniferum."
- This statement is also correct as it accurately describes the source of opiate drugs.

5. **Conclusion**:
- The incorrect statement regarding opioid drugs is **Option 1**.

### Final Answer:
The incorrect statement for opioid drugs is: "They bind to a specific opioid receptor present in our brain or VNS only."

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