# Searching for drugs/vaccines with WHODrug

Navigate to the “**`Drug/Vaccine`**” tab under the advanced filters to filter WHODrug. The following filtering options are available:

* **`Drug name (WHODrug)`**: Type in the name of the drug to search for reports with that drug. Both trade name and active ingredient can be entered.
* **`Active ingredient(s) (WHODrug)`**: A search on active ingredient will retrieve all reports with this active ingredient, regardless of whether coding was done on trade name or active ingredient.
* **`Batch number`**: Enter the batch number of both medicines and diluents.
* **`ATC code`**: For a broader search, enter the ATC code of interest.
* **`Indication (MedDRA)`**: Reports can also be filtered by indication.

<figure><img src="/files/mhrEIFr3YQO4ysyx4mEQ" alt=""><figcaption></figcaption></figure>


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://support.who-umc.org/vigiflow/find-relevant-reports-using-filters/searching-for-drugs-vaccines-with-whodrug.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.