| Local | Systemic | Coagulation | |
| Minimal | Swelling, erythema or ecchymoses confined to site of bite | No coagulation signs or symptoms | No coagulation abnormalities or other important laboratory abnormalities |
| Moderate | Progress of swelling, erythema or ecchymosis beyond the site of bite | Non life threatening signs and symptoms (Nausea, vomiting, perioral paraesthesia, myokymia & mild hypotension) | Mildly abnormal coagulation profile, clinically significant bleeding and mild abnormalities on other tests |
| Severe | Rapid swelling, erythema or ecchymosis involving the entire body part | Markedly severe signs and symptoms (hypotension?SBP < 90 mmHg, altered sensorium, tachycardia, tachypnoe and respiratory distress) | Markedly abnormal coagulation profile with evidence of bleeding or threat of spontaneous hemorrhage, (unmeasurable INR, a PTT & fibrinogen and severe thrombocytopenia < 20,000/cmm) |