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Surelac

Generic name: lactase

Brand names: Lactaid, Lactaid Fast Act, Lactaid Ultra, Lac-Dose, Lactrase, Surelac

Last updated November 3, 2026 0 views
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What is Surelac?

Surelac is an enzyme that helps your body break down lactose in dairy products. If you are lactose-intolerant, consuming a dairy product can cause gas, bloating, stomach pain, or diarrhea.

Surelac is a dietary supplement that can help prevent these symptoms in people with lactose intolerance who consume milk or other dairy products.

It is not certain whether Surelac is effective in treating any medical condition. The FDA has not approved this product for medicinal use. This medicine should not be used instead of medication prescribed by your doctor.

Surelac is often sold as a dietary supplement. There are no regulated manufacturing standards for supplements, and some products on the market have been found to be contaminated with toxic metals or other drugs. Dietary supplements should be purchased from a reliable source to reduce the risk of contamination.

Surelac may also be used for purposes not listed in this product guide.

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How should I take Surelac?

When thinking about using a supplement, talk to your doctor. You might also want to consult someone who is trained in herbal or health supplements.

If you decide to use Surelac, follow the directions on the package or those given by your doctor, pharmacist, or other healthcare provider. Do not use more of this product than what is recommended on the label.

Take Surelac with the first bite or sip of any dairy product you eat or drink. You can take this medicine every day with each meal and snack that includes dairy.

If you consume more dairy products after 30 to 45 minutes, take Surelac again.

Contact your doctor if you still have symptoms of lactose intolerance or if your symptoms worsen while using this product.

Store at room temperature away from moisture and heat. Do not refrigerate.

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Warnings

Follow all directions on the label and package. Use exactly as directed.

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Before taking this medicine

This product may have phenylalanine and could be harmful if you have phenylketonuria (PKU).

Check with a doctor, pharmacist, or other healthcare provider to see if it is safe for you to use this product if you have other medical conditions.

Do not give Surelac to a child younger than 4 years old.

Consult a doctor before using this product if you are pregnant or breastfeeding.

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Surelac side effects

Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Less serious side effects may happen more often, and you might not experience any at all.

This is not a complete list of side effects, and others may occur. Call your doctor for medical advice about side effects. You can report side effects to the FDA at 1-800-FDA-1088.

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What happens if I miss a dose?

Take your dose as soon as possible at the start of a meal or snack. Do not take two doses at once.

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What happens if I overdose?

An overdose of Surelac is not likely to lead to serious symptoms.

Do not take your dose too early or too late compared to a meal that has dairy, or Surelac may not work as well.

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What other drugs will affect Surelac?

Other drugs may affect Surelac, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all other medicines you use.

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Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.