My Daughter Age 27 Weight 54 Has Been Suffering From

My daughter age 27 weight 54 has been suffering from gas issue. She gets up uneasy in the morning with a feeling of gas trapped and mild stomach ache. She has consulted a gastrointestinal physician who prescribed her NEXPRO IT 40mg/150mg before breakfast. She took this medicine as prescribed for 10 days and stopped. For 1day she was fine but the very next day the condition was sameThis problem though not acute but has been persistent since 2-3 months