Does Maxgalin 75 Cause Drowsiness?

Hi, My husband is been advised to take maxgalin 75, it is now 3 months since he started taking it. For the past 10 days he feels drowsiness and sleepiness throughout the day. And he is unable to sleep continuously ( not more than 3 - 4hrs). Is it the due to the side effects? If so how to overcome this? Thank you.