Can i take magnesium and ribflavin for migraine auras?

Of course: You can definitely take them - just they won’t do any good. Neither has any influence on migraine headache or aura

Prevention: Magnesium and/ or riboflavin have been used successfully to prevent headaches in modest percentages of patients, if correct dosing is applied. Other OTC agents may be more successful, such as butterbur, CoQ-10, and feverfew. A neurologist can assist in adjusting dosages to achieve maximal efficacy with this approach.