Magnesium question.?!?!

Victoria

Is too much magnesium bad? My OB gave me a script today for 400 mg to take 2x a day.

(Due to my headache I had for 5 days)

But today I woke up with no headache.

Idk if I should take both pills as it says or just take one..

I’m sure my headaches are from my sinus’s tho. Idk🤷🏽‍♀️