Hydroxocobalamin Side Effects and Warnings

What are the precautions when taking this medicine?

• Check medicines with healthcare provider. This medicine may not mix well with other medicines.

• You can get sunburned more easily. Avoid sun, sunlamps, and tanning beds. Use sunscreen; wear protective clothing and eyewear.

• Tell healthcare provider if you are pregnant or plan on getting pregnant.

• Tell healthcare provider if you are breast-feeding.

What are some possible side effects of this medicine?

• Diarrhea.

• Irritation where the shot is given.

Injection (I.V.):

• High blood pressure. Blood pressure usually returns to normal when medicine is stopped.

• Change in color of urine to red. May last 5 weeks.

• Change in color of skin to red. May last 2 weeks.

• Acne-like rash.

• Headache.

• Nausea or vomiting.

Reasons to call healthcare provider immediately

• If you suspect an overdose, call your local poison control center or emergency department immediately.

• Signs of a life-threatening reaction. These include wheezing; chest tightness; fever; itching; bad cough; blue skin color; fits; or swelling of face, lips, tongue, or throat.

• Swelling or pain of leg or arm.

• Severe diarrhea.

• Feeling extremely tired or weak.

• Any rash.

• No improvement in condition or feeling worse.