Time (hours) Entacapone
AT 25°C AT 10°C
    Area % Difference w.r.t. Initial
Initial 3163365 - 3208318 -
24 hours 3161080 0.07 3199728 0.26
Time (hours) Levodopa
AT 25°C AT 10°C
    Area % Difference w.r.t. Initial
Initial 213017 - 218864 -
24 hours 214085 - 218927 -
Time (hours) Carbidopa
AT 25°C AT 10°C
    Area % Difference w.r.t. Initial
Initial 44007 - 43818 -
24 hours 42816 2.71 43589 0.52
Table 5: Observation of solution stability.