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Dr Basu
Dr Basu, Experienced Specialist
Category: Medical
Satisfied Customers: 29182
Experience:  MD
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I am on Prozac for low serotonin and recently doctor

Customer Question

I am on Prozac for low serotonin and recently doctor increased my metformin from 500 mg per day to 1000mg, 2x day. I have only taken new dosage for 2 days and am experiencing low serotonin symptoms again. Does metformin affect the serotonin levels?
JA: What medications do you take daily? Are you allergic to any medications?
Customer: Allergic to codeine & percocete. Also take Lisinophil/hctz, 20-125 2x, Gemfibrozil600 mg 2x, pravastatin 40 mg 1x.
JA: Anything else in your medical history you think the doctor should know?
Customer: Have battled with low serotonin for 15 yrs. and has been controlled for last 8 yrs. until today.
Submitted: 2 months ago.
Category: Medical
Expert:  Dr Basu replied 2 months ago.

Hi there,
This is Dr Basu, experienced Internal Medicine Specialist.
I am here to address your concerns and provide great service.

It is other way round. Prozac can cause more drop in blood sugar level with metformin.
Hence increased dose of metformin may be causing too much drop in blood sugar. That can result in low serotonin like symptoms.
You should check your blood sugar at home.
Metformin dose should be reduced to the original dose after discussing with your doctor.
Best wishes,
It was my pleasure to help you today.
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