Hello I have gone through your question and understand your concerns. Sumatriptans( Sumanit) is clinically proven to be better than ergotamines (vasograins) for treatment of migraine in effectiveness and alleviating symptoms of nausea. It must be very clear that all the medications have both effects and side effects. Prescribing a medication is task of balancing the risk and benefits of the drug and bring out the best outcome with lowest side effects possible. Sumanit causes weakness or numbness of limbs, vision disturbances and should be taken with caution in patients with blood circulation disorders. If the symptoms of migraine does not appear to subside with the current dose of Sumanit, consult the prescribing to adjust the dosage. Hope your concern is answered. Thank you.