For people with celiac disease or a gluten allergy, eating the wrong food can be painful – if not dangerous.

Of course, you know to avoid things like whole-wheat bread and to search out gluten-free alternatives wherever possible, but there are still places where gluten lurks like a snake, ready to strike you at the first chance.

To keep yourself from being bitten, make sure you check these five things first.

1. Medications

Many prescription medications contain gluten, which your doctor may not be aware of. Even many pharmacists are unaware of which medications are made with gluten-containing products, making this a challenging problem to address.

The website GlutenFreeDrugs.com has a list of all known medications that may contain gluten, so you can ask for an appropriate substitute for yourself or a loved one.

2. Candy

Candy manufacturers often use malt in candy, even in things like licorice, where you wouldn’t expect it. If possible, avoid the candy.

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If you can’t bear to give up your sweet tooth, remember to check the label to ensure that you are only consuming gluten-free sweets.

3. Wheat-free Products

It is a byproduct of wheat, so a product labeled wheat-free should be safe, right? Actually, no. It can be found in other grains and foods – even those that do not contain wheat.

Facilities that make grain-free foods also often work with those made from wheat, increasing the risk of cross-contaminations.

4. Cornbread

While cornmeal itself is generally okay, pre-packaged mixes often contain wheat flour, as does the cornbread available in many restaurants.

Some brands of cornmeal also may contain wheat-based products, so make sure you check the label before making or eating cornbread.

5. Cooking Utensils

It may not be much, but even trace amounts of gluten can be dangerous to those with celiac disease.

Cooking utensils used for regular cooking can easily make a meal intolerable for someone with these conditions. Make sure that you designate utensils for cooking with gluten and ones for cooking without.

It lurks in unexpected places, which can make managing celiac all the more difficult.

This list reveals some of the most common unexpected culprits, but there are many others. Make sure you read the labels before eating – or serving – food that might make you or a loved one sick.