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Generic Name: Lactase [LAK-tase].

Brand Names: Dairy Ease, Lactaid, Lactaid Fast Act, Lactaid Ultra, Lac-Dose, Lactrase, and Surelac.
Drug Class: Digestive enzymes.

What is lactrase?

The enzyme lactrase aids the body in breaking down lactose found in dairy products. If you're lactose intolerant, consumption of dairy products could cause gas or stomach pain. It can also cause bloating, gas, or diarrhea. Lactrase is a nutritional supplement that can reduce symptoms for people suffering from lactose intolerance who drink milk or other dairy products.

It isn't known for certain if lactrase can be effective in treating any medical issue. The medicinal use of this product is not recognized by the FDA. This medication is not to be used to replace medications prescribed by your physician. Lactrase is usually advertised as a dietary supplement. There aren't any regulated manufacturing guidelines for supplements, and some of the products that are advertised have been found to contain harmful metals or other substances. Dietary supplements must be purchased from a trusted source to avoid the possibility of contamination. Lactrase could be used for other reasons not mentioned in this guideline for products.

Side effects of Lactrase

Contact a medical professional immediately. Get medical attention immediately if you notice symptoms that indicate an allergic reaction, such as hives, difficulty breathing, and swelling of your lips, face, and tongue.

The less serious side effects could be more likely, and you could not experience any whatsoever. This isn't a complete list of possible side effects, and other side effects could be present. Consult your physician for advice regarding medical effects. You can report any side effects to the FDA at 1-800-FDA-1088.

Before you take this drug.

The product could contain phenylalanine. It could cause harm if you suffer from phenylketonuria (PKU). Consult a pharmacist, doctor, or other healthcare professional to determine whether it is appropriate for you to take this medication in the event of any other medical conditions. Don't give lactrase to any child less than 4 years of age. Consult your doctor prior to taking this product if you are breastfeeding or pregnant.

How to take lactrase?

If you are considering taking supplements, make sure you consult your physician. You might also think about consulting someone who has received training in the use of herbal or health supplements. If you decide to use Lactrase, take it as stated on the package or as prescribed by your pharmacist, doctor, or any other healthcare professional. Don't use more than what is suggested by the manufacturer on its label.

Take lactrase when you take your very first bite of any dairy product that you consume. It is possible to take this medication throughout the day, with each meal or snack containing dairy. If you eat more dairy products in the next 30-45 minutes, drink Lactrase again. Consult your doctor if you continue to experience the symptoms associated with lactose inadequacy. Also, the symptoms worsen when you use this product. Keep at room temperature, away from heat and moisture. Avoid refrigerating.

What happens if I miss a dose?

Dose as quickly as you can, at the beginning of your meal or snack. Don't take two doses at once.

What happens if I overdose?

An overdose of lactrase is not likely to cause any serious symptoms.

What should be avoided?

Do not take your medication at the wrong time or with respect to food items that contain dairy products, or lactrase may not be as effective.

Interaction with other drugs

Other medications can impact lactrase. Other medications can affect lactrase, including prescription and over-the-counter medicines, vitamins, and herbal products. Inform your physician about any other medications you take.



Prescription only

Pregnancy & Lactation

CSA Schedule*

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