Which one of the following can possibly be used as analgesic without causing addiction and mood modification?

Options

A. Diazepam
B. Morphine
C. N-acetyl-para-aminophenol
D. Tetrahydrocannabinol

Explanation

To solve the question of which substance can be used as an analgesic without causing addiction and mood modification, we can follow these steps:

### Step 1: Understand the Terms
- **Analgesic**: A medication that reduces or eliminates pain.
- **Addiction**: A condition where a person becomes dependent on a substance, often leading to compulsive use.
- **Mood Modification**: Changes in emotional state due to the influence of a substance.

### Step 2: Analyze the Given Options
The options provided are:
1. Diazepam
2. Morphine
3. N-acetyl Para-Aminophenol
4. Tetrahydrocannabinol

### Step 3: Evaluate Each Option
- **Diazepam**: This is a tranquilizer that acts on the central nervous system. It can cause mood modification and has the potential for addiction.

- **Morphine**: This is a strong opioid analgesic. It is effective for pain relief but is highly addictive and can cause significant mood changes.

- **N-acetyl Para-Aminophenol**: This is commonly known as Paracetamol (or Acetaminophen). It is widely used as an analgesic and antipyretic. Importantly, it does not cause addiction or significant mood modification.

- **Tetrahydrocannabinol (THC)**: This is the psychoactive component of cannabis. It can alter mood and has potential for addiction.

### Step 4: Identify the Correct Answer
From the evaluation, the only option that serves as an analgesic without causing addiction or mood modification is **N-acetyl Para-Aminophenol**, which is Paracetamol.

### Conclusion
The correct answer is **N-acetyl Para-Aminophenol (Paracetamol)**.

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