What are antagonistric drug ?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Antagonistic Drugs**: Antagonistic drugs are substances that bind to specific receptor sites in the body and inhibit or block the natural function of those receptors.

2. **Mechanism of Action**: When an antagonistic drug binds to a receptor, it prevents other substances (like hormones or neurotransmitters) from binding to that receptor. This inhibition can alter physiological responses.

3. **Example of an Antagonistic Drug**: A well-known example of an antagonistic drug is Cimetidine.

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