Do not take 2 at the same time. 200 mg can be taken 2 times a day but not at the same time, too hard on the stomache. And again contact your dr.
That's a question for your doctor - medications should be taken as prescribed unless otherwise advised. You can always call your pharmacist as well, if you can't get ahold of the doctor right away.
Next time you are prescribed something, always ask about dosage - when to take it, with food or empty stomach, if it's okay to increase or decrease the dose as needed.