Which of the following are used as analgesics ?

Options

A. Aspirin
B. Heroin
C. Promethazine
D. Serotnin

Answer

To determine which of the following substances are used as analgesics, let's analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Analgesics**:
- Analgesics are drugs that are used to relieve pain. They can be classified into different categories, including non-opioid analgesics and opioid analgesics.

2. **Evaluating Each Option**:
- **Aspirin**:
- Aspirin is a well-known non-opioid analgesic. It is commonly used to relieve mild to moderate pain and reduce inflammation.
- **Conclusion**: Aspirin is an analgesic.

- **Heroin**:
- Heroin is an opioid analgesic. It is used medically for pain relief but is more commonly known for its illegal use and potential for addiction.
- **Conclusion**: Heroin is an analgesic.

- **Bromethagine**:
- Bromethagine is not commonly recognized as an analgesic. It is primarily used as an antihistamine and does not have pain-relieving properties.
- **Conclusion**: Bromethagine is not an analgesic.

- **Serotonin**:
- Serotonin is a neurotransmitter involved in various functions in the body, including mood regulation. It is not used as an analgesic.
- **Conclusion**: Serotonin is not an analgesic.

3. **Final Answer**:
- Based on the evaluations, the substances that are used as analgesics from the provided options are **Aspirin and Heroin**. Therefore, the correct answers are A (Aspirin) and B (Heroin).

### Summary:
- **Correct Analgesics**: Aspirin and Heroin
- **Incorrect Analgesics**: Bromethagine and Serotonin