Methionine (Oral)

Racemethionine is used to make urine more acidic. This helps relieve skin irritation in adults with incontinence (loss of bladder control) and diaper rash in infants. This medicine also helps control strong urine odor.

Racemethionine is available only with your doctor's prescription.

If your rash has not gotten better after 10 days, contact your doctor.

In deciding to use a medicine, you need to consider the risks of taking it against the benefits it may provide. This is a choice you will make together with your doctor. For this medicine, consider the following:

Allergies

Inform your doctor if you have ever had any unusual or allergic reactions to this medicine or any other medicines. Also, let your healthcare professional know if you have any other allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

This medicine has been tested in children and, at effective doses, has not been shown to cause different side effects or problems compared to adults.

Geriatric

Many medicines have not been specifically studied in older adults. Therefore, it may not be clear whether they work the same way as they do in younger adults. While there is no specific information on the use of racemethionine in elderly patients compared to other age groups, this medicine is not expected to cause different side effects or problems in older adults than in younger adults.

Interactions with Medicines

Some medicines should not be used together, while in other cases, two different medicines may be used together even if an interaction might happen. In these situations, your doctor may want to adjust the dose or take other precautions. Inform your healthcare professional if you are taking any other prescription or nonprescription (over-the-counter [OTC]) medicine.

Interactions with Food/Tobacco/Alcohol

Some medicines should not be taken around the time of eating food or certain types of food because interactions may occur. Using alcohol or tobacco with some medicines may also lead to interactions. Talk with your healthcare professional about using your medicine with food, alcohol, or tobacco.

Other Medical Problems

Other medical problems may affect how you can use this medicine. Be sure to tell your doctor about any other medical issues you have, especially:

• Acidosis (metabolic) or
• Liver disease—Using racemethionine may worsen these conditions.

Some side effects may occur that usually do not require medical attention. These side effects may go away as your body gets used to the medicine. Your health care professional may also have suggestions on how to prevent or lessen some of these side effects. Contact your health care professional if any of the following side effects continue, are bothersome, or if you have any questions about them:

More common

• Drowsiness
• Nausea and vomiting

Other side effects not listed may also happen in some patients. If you notice any other effects, consult your health care professional.

Call your doctor for medical advice about side effects. You can report side effects to the FDA at 1-800-FDA-1088.

In the U.S.

• ME-500

You should not take more of this medicine, or take it more often, than your doctor ordered. You should also make sure that you get enough protein in your diet. This is especially important in infants. Infants who get too much racemethionine and not enough protein may not gain weight as they should. If you have any questions about this, ask your health care professional.

Take racemethionine with, or just after, meals.

For patients taking racemethionine capsules:

• If you are unable to swallow the capsule, the contents may be added to juice, water, or warm milk or infant formula.

For patients taking racemethionine oral solution:

• Use a specially marked measuring spoon or other device to measure each dose accurately. The average household teaspoon may not hold the right amount of liquid.

Make certain your health care professional knows if you are on any special diet, such as a low-protein diet.

Dosing

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

• For making urine more acidic: For oral dosage form (capsules): Adults and teenagers—The usual dose is 200 milligrams (mg) three or four times a day. Children—The usual dose is the contents of 1 capsule (200 mg) added to a warm bottle of milk or formula in the evening, or added to a glass of juice or water. For oral dosage form (oral solution): Adults and children older than 14 months of age—The usual dose is 2⅔ teaspoonfuls (200 mg) three or four times a day. Children 6 to 14 months of age—The usual dose is 1 teaspoonful (75 mg) four times a day for three to five days. Children 2 to 6 months of age—The usual dose is 1 teaspoonful (75 mg) three times a day for three to five days. Children up to 2 months of age—Dose must be determined by your doctor. For oral dosage form (tablets): Adults and teenagers—The usual dose is 500 mg three or four times a day. Children—The capsule or oral solution is the recommended dosage form for this age group.

Missed Dose

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.