What effects does an overdose of quinine sulphate have on the body?

Quinine: Effects of an overdose people who take too much quinine may have overdose symptoms that could include: •headaches •nausea and vomiting •abdominal (stomach) pain •diarrhea •drowsiness •incoordination •breathing problems •dizziness •sweating •flushing (sudden redness and warmth of the skin) •ringing in the ears •hearing problems, including complete hearing loss •vision problems, .