there are 20 pills in each bottle of Robotussin Cough Gels and each gel has 15 mgs of dxm in them so 100 pills would be 1500 mgs which is INSANELY high and a trip like that you most likely woulnt remeber anything so i would suggest for the very experecned tripper to do 40-60 robotussin gels but 100 is alot