Folcin 1 Injection is a nutritional supplement. It is used to treat vitamin C deficiency in the body. It is usually taken when your diet does not provide enough vitamin C. It also helps in treating certain conditions caused due to low level of vitamin C in the body. Folcin 1 Injection is generally administered by a healthcare professional. You should not self-administer it at home. This medicine may be only part of a complete program of treatment that also includes making changes to your diet and taking vitamin supplements. Learn about the foods you should eat to make sure you get enough vitamin C in your diet. You should not take more or use it for longer than recommended. Folcin 1 Injection is generally safe with little or no side effects. However, it may pain, redness, or swelling at the site of injection in some people. Before taking this medicine, let your doctor know any other medicines you are taking. Some other medicines can decrease the absorption of vitamin C or interact with it. It is important to ask advice from the doctor before you take any other vitamin supplements.