The common side effects of warfarin
are headaches, dizziness, weakness, nosebleeds, unusual bruising
, purple colored toes, etc.Pain in the ribs can be due to any muscle sprain, muscle strain or costochondritis.The common symptoms of pulmonary embolism are pleuritic chest pain, shortness of breath, coughing up of blood etc. Without a complete evaluation it is difficult to determine the exact cause. A clinical examination and work up is important for correct diagnosis. Seek medical help.