system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
After taking some drug for acute attack of migraine a patient develop nausea and vomiting he also develop tingling and numbness in the tip of the finger that also turn blue. which of the following is most likely drug implicated in the cause the above finding
assistant
The correct answer is  This is a classical sign of ergot induced vasoconstriction dihydroergotamine can be used for acute attack of migraine and can result in such symptoms. due to their vasoconstriction potential Ergot alkaloids are contraindicated in a patient with peripheral vascular disease this may lead to development of gangrene. Refer katzung 11/e p289