Mention one synthetically prepared drug which is generally used to treat fungal infections. Name one disease which can be treated with this drug.

Explanation

**Step-by-Step Solution:**

1. **Identify a Synthetically Prepared Drug for Fungal Infections**: One commonly used synthetically prepared drug to treat fungal infections is "Fluconazole."

2. **Identify a Disease Treated by the Drug**: Fluconazole is effective in treating various fungal infections, one of which is "Candidiasis."

3. **Summarize the Information**: Therefore, the answer to the question is:
- **Drug**: Fluconazole
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