what are the symptoms of taking too many painkillers?
['Nausea.', 'Drowsiness.', 'Dizziness.', 'Itching or sweating.', 'Depression.', 'A weakened immune system.', 'Tolerance, meaning that over time, your body needs more of the drug to get the same effect.', "Addiction, meaning you want to keep taking these drugs even when you don't need them anymore."]