Your daughter needs to be reexamined by pediatrician
for 10 days with poor feeding may be serious.
The underlying cause of her illness should be diagnosed first. Medicines will be prescribed accordingly. Mucolite
and Maxtra Drops can be given, but only after examining the baby by a doctor.
Infant medicine doses are very critical and depends on baby's body weight / age / other clinical parameters. Drug interactions, overdosing and underdosing may be (and usually) very harmful. Do not give any medicine to your baby unless prescribed by doctor.
Please take her to Pediatrician.
Feel free to post if you have other queries.