Leucovorin calcium is used to treat methotrexate which is used to treat various cancers. In addition, it is used in the treatment of anemia and colon cancer. To buy Leucovorin calcium 50mg online it is advisable to refer to Magicine Pharma as they provide these medications at an affordable rate. Some side effects of this medication are rashes, itching, shortness of breath, and swelling.