Clip 500 Tablet promotes blood clotting and can rarely cause blood clot to travel to the lungs (pulmonary embolism) which can turn fatal sometimes. Pulmonary embolism is not a common side effect in patients taking Clip 500 Tablet but can occur in overdosing, patients with long bedrest or prone individuals. Evidence suggests that the increased risk of clot can be due to some other additional risk factors as well.