I would be very careful about this and report the double dosage to your doctor.
On this medication site they advise: "Doses above 20 mg/day may be administered on a once-a-day (morning) or BID schedule (i.e., morning and noon) and should not exceed a maximum dose of 80 mg/day."
If you take too much prozac you could be in danger of serotonin syndrome which you can read about here.
Give your doctor a call and see what he or she says.
Thank you for your question.
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