Clopedogrel tablet's side effects

My daughter is a heart patient she is under medication ie. 6mg clopidogrel once a day for 5 days/week and .6 ml digoxin solution twice daily. I feel my baby is little bit inactive and drowsy when i give her clopidogrel . Is it advisable to give this at night so that she can sleep well and pls let me know what are the side effects of this tablet.