Gemer P2 manufactured by Sun Pharmaceuticals contains the active ingredients: Glimepiride 2mg + Metformin 500mg + Pioglitazone 15mg.

Side effects of Glimepiride may include:
dizziness
nausea
yellowing of the skin or eyes
light-colored stools
dark urine
pain in the upper right part of the stomach
unusual bruising or bleeding
diarrhea
fever
sore throat

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Side effects of Metformin may include:
diarrhea
bloating
stomach pain
gas
indigestion
constipation
unpleasant metallic taste in mouth
heartburn
headache
flushing of the skin
nail changes
muscle pain
chest pain
rash

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Side effects of Pioglitazone may include:
headache
muscle pain
pain in the arms or legs
sore throat
gas
changes in vision
vision loss
frequent, painful, or difficult urination
cloudy, discolored, or bloody urine
back or abdominal pain

With regards to dosing and contraindications, I would highly recommend discussing these topics with your doctor since he/she is the one prescribing you this medication and therefore knows how much you should be taking and when. Your doctor or health-care provider should also inform you of any contraindications that may or may not apply to you, depending on your medical records, health, and whether or not you are on any other medications that might interfere with Gemer P2.

I hope this info helps!