---
title: ToolRouter — Agent Use Case Guide
description: Step-by-step guide for completing a task with a specific AI agent using ToolRouter.
url: https://toolrouter.com/tools/drug-info/use-cases/research-side-effects/claude
---
# How to Research Side Effects with Claude

Claude turns adverse event research into a multi-layered investigation. Start with one drug, compare its side effect profile against alternatives, drill into the frequency of specific reactions, and build a complete safety picture through progressive follow-up questions. Each layer of questioning adds depth to your analysis.

## Setup

claude mcp add toolrouter -- npx -y toolrouter-mcp

## Steps

1. Connect ToolRouter: claude mcp add toolrouter -- npx -y toolrouter-mcp
2. Ask Claude: "Check adverse events for metformin using drug-info"
3. Claude returns the most commonly reported side effects
4. Ask: "Which of these are serious versus mild?"
5. Review the frequency data for each side effect

## Example Prompt

```
What are the most commonly reported side effects for Ozempic? Use drug-info to check the FDA adverse event database.
```

## Tips

- Compare adverse event reports across similar drugs to evaluate options
- Ask Claude to rank side effects by frequency of reports
- Adverse event reports show correlation, not proof of causation
