What is Vitamin C MedPro Treating and preventing low levels of vitamin C. It may also be used for other conditions as determined by your doctor. Vitamin C MedPro is a vitamin. It works by supplementing vitamin C, which is used in many functions in the body. Important safety information: Do not take large doses of vitamins while taking Vitamin C MedPro unless directed to by your doctor. Vitamin C MedPro may cause incorrect results with some in-home cholesterol test kits. Check with your doctor or pharmacist if you are taking Vitamin C MedPro and need to check your cholesterol at home. Diabetes patients - Vitamin C MedPro may cause incorrect test results with some urine glucose tests. Check with your doctor before you adjust the dose of your diabetes medicine or change your diet. Vitamin C MedPro may cause incorrect test results with kits used to check for blood in the stool. Check with your doctor if you are taking Vitamin C MedPro when using the test kit. PREGNANCY and BREAST-FEEDING: If you become pregnant while taking Vitamin C MedPro, discuss with your doctor the benefits and risks of using Vitamin C MedPro during pregnancy. Vitamin C MedPro is excreted in breast milk. If you are or will be breast-feeding while you are using Vitamin C MedPro, check with your doctor or pharmacist to discuss the risks to your baby. Vitamin C MedPro side effects All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome: Burning, stinging, or swelling at the injection site. Seek medical attention right away if any of these SEVERE side effects occur: Severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue). This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.