Cobolin-M injection

You should not use this medicine if you are allergic to cyanocobalamin or cobalt, or if you have Leber's disease (an inherited form of vision loss). Cyanocobalamin can lead to optic nerve damage (and possibly blindness) in people with Leber's disease.

To make sure cyanocobalamin injection is safe for you, tell your doctor if you have:

• cold or allergy symptoms that affect your nose (sinus congestion, sneezing);

• kidney or liver disease;

• iron or folic acid deficiency;

• any type of infection; or

• if you are receiving any medication or treatment that affects bone marrow.

FDA pregnancy category C. It is not known whether cyanocobalamin will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while using this medicine.

Cyanocobalamin can pass into breast milk and may harm a nursing baby. Tell your doctor if you are breast-feeding a baby.

Call your doctor for instructions if you miss a dose.

Avoid drinking large amounts of alcohol while you are being treated with cyanocobalamin.

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.

Call your doctor at once if you have:

• numbness or tingling in your hands or feet;

• signs of fluid build-up around your lungs--anxiety, sweating, pale skin, severe shortness of breath, wheezing, gasping for breath, cough with foamy mucus, chest pain; or

• signs of low potassium--confusion, uneven heart rate, extreme thirst, increased urination, leg discomfort, muscle weakness or limp feeling.

Common side effects may include:

• swelling, rapid weight gain;

• diarrhea; or

• itching or mild rash.

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.

Other drugs may interact with cyanocobalamin, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell each of your health care providers about all medicines you use now and any medicine you start or stop using.