It's normal.. because small amount of drop goes in mouth also through normal passage

Bitter taste could be due to the eye drops. Ask her to put only one drop at a time and then close the eye for 4-5 minutes. If she does not close the eye after putting the eye drops, it will give her bitter taste because the eye drop passes through the nasal passages --- into the mouth. Yellow colour of urine cannot be due to eye drops. You have to consult your doctor for that. May be she has been given a multivitamin which will cause yellow urine (which is normal)

It is Normal to have bitter taste,after eye drops.it shows that the Lacrimal passage is patent,which is good.pl do complete urine exam.pl consult ophthalmologist for further evaluation and treatment.

Bitter taste can be due to eye drop trickling into the mouth. Nothing to worry.