Hemorrhage is the principal adverse effect of oral anticoagulants. Jaundice, hepatic dysfunction, vasculitis, pancreatitis, nausea, vomiting, diarrhoea, taste perversion, abdominal pain, flatulence, bloating, rash, purpura, erythematous swollen skin patches leading to ecchymosis, pruritus, alopecia, purple discolouration of toes due to cholesterol embolisation, tracheal or tracheobronchial calcification, fever, chills. Unexplained drop in haematocrit, decreased Hb. Rarely, hypersensitivity reactions.
Potentially Fatal: Haemorrhage from almost any organ of the body w/ the consequent effects of haematomas as well as anaemia, tissue necrosis and/or gangrene of skin or other tissues w/ SC infarction.