What are opiate antagonists?

Explanation

### Step-by-Step Text Solution

1. **Definition of Opiates**: Opiates are a class of drugs derived from the opium poppy plant. They are primarily used for their analgesic (pain-relieving) properties. Common examples include morphine and codeine.

2. **Mechanism of Action**: Opiates work by binding to specific receptors in the central nervous system (CNS) and the gastrointestinal tract (GIT). These receptors are known as opioid receptors. When opiates bind to these receptors, they produce effects such as pain relief, sedation, and a feeling of calmness.

3. **Addiction Potential**: While opiates are effective for pain relief, they also have a high potential for addiction. Prolonged use can lead to physical and psychological dependence. If a person stops taking opiates suddenly, they may experience withdrawal symptoms.

...