Can Medications Contain Gluten?

When adopting a gluten-free diet, we become experts at reading food labels. But we often swallow pills without a second thought. While the active ingredient in your medication (like ibuprofen or amoxicillin) is gluten-free, the inactive ingredients—called excipients—might not be.

Excipients are used to bind pills together, add bulk, or improve absorption. Starches are commonly used for these functions, and that is where the risk lies.

Understanding "Starch" on the Insert

The most common sources of starch in medications are corn, potato, tapioca, and wheat. The problem is that pharmaceutical labeling laws are often less strict than food labeling laws.

If a package insert simply lists "starch" or "pregelatinized starch" without specifying the source, it introduces uncertainty. In the United States, corn is the most common source, but wheat starch is still used in a small percentage of medications.

Ingredients to Watch For

While mostly rare, if you see the following terms on a medication package insert, you need to verify the source:

• Wheat starch (danger)
• Modified starch (undefined source)
• Pregelatinized starch (undefined source)
• Dextrates (usually corn, but verify)
• Dextrin (usually corn/potato, but verify)

How to Verify Safety

Unlike food, you cannot always rely on the box. Here is the protocol for safety:

1. Check the "Inactive Ingredients" list: Look for the word "wheat."
2. Ask your Pharmacist: They have access to detailed databases that can confirm the source of starches.
3. Call the Manufacturer: If there is ambiguity, call the customer service number on the bottle. Ask specifically: "What is the source of the starch in this product?"