If you are lactose intolerant, your body is deficient in an enzyme called lactase. Lactase helps break down lactose, a sugar present in milk and dairy products. Taking a lactase enzyme supplement before eating a dairy product may reduce lactose intolerance symptoms. However, before using this treatment discuss the side effects of lactase enzyme with your doctor.
No Side Effects
When used as directed, lactase enzyme is not known to cause adverse side effects. However, seek additional care from your physician if you experience any health problems after taking lactase enzyme.
Allergic Reaction
Rarely, an allergic reaction to lactase enzyme may occur in people sensitive to this medication. A serious allergic reaction may cause such symptoms as a rash, dizziness, intense itching, facial swelling, difficulty swallowing and trouble breathing. Emergency medical care is necessary for anyone who experiences these side effects after taking lactase enzyme. Left untreated, an allergic reaction may be life-threatening.
Warnings
Women who are pregnant or breast-feeding should consult their doctor before using any type of supplement or medication, including lactase enzyme.
Recommended Dosage
Lactase enzyme is available over the counter in a variety of preparations, including tablets, capsules and drops. For people with lactose intolerance, the recommended dose of lactase enzyme tablets is 6,000 to 9,000 international units, or IU, taken prior to consuming food items containing lactose. However, the amount of lactase enzyme you should take may vary depending on your age or body weight. Consult your doctor for more personalized lactase enzyme dosage recommendations.



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