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Cystadane Patient Information Including Side Effects

Brand Names: Cystadane

Generic Name: betaine (Pronunciation: BET aine)

What is betaine (Cystadane)?

Betaine is a nutrient that is important for functioning of the heart and blood vessels. Betaine works in the body by preventing the build-up of an amino acid called homocysteine. This amino acid can harm blood vessels and contribute to heart disease, stroke, or circulation problems.

Betaine is a byproduct of sugar beet processing.

Betaine is used to reduce homocysteine levels in people with a genetic condition called homocystinuria, in which the amino acid builds up in the body. Betaine is not a cure for homocysteinuria.

Betaine may also be used for purposes not listed in this medication guide.

What are the possible side effects of betaine (Cystadane)?

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

Stop using betaine and call your doctor at once if you have a serious side effect such as:

  • unusual headache, dizziness, neck pain or stiffness
  • memory problems;
  • changes in your mental state;
  • vision changes;
  • problems with speech, balance, or walking;
  • decreased consciousness; or
  • seizure (black-out or convulsions).

Less serious side effects may include:

  • nausea, upset stomach;
  • diarrhea;
  • unusual body odor; or
  • unpleasant taste in your mouth.

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

Read the Cystadane (betaine anhydrous) Side Effects Center for a complete guide to possible side effects

What is the most important information I should know about betaine (Cystadane)?

You should not use betaine if you are allergic to it.

To make sure you can safely take betaine, tell your doctor about all of your medical conditions.

Follow the directions on your prescription label. Do not use in larger or smaller amounts or for longer than recommended. Your doctor may occasionally change your dose to make sure you get the best results.

Betaine powder must be mixed with water, juice, milk, food or infant formula just before taking it.

Stop using betaine and call your doctor at once if you have an unusual headache, dizziness, neck pain or stiffness, problems with memory or speech, changes in your mental state, vision changes, decreased consciousness, or seizure (black-out or convulsions).

Betaine is only part of a complete program of treatment that may also include other vitamin and mineral supplements and a special diet. Follow your diet and medication routines very closely.

Side Effects Centers

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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