Normal saline drops ( nasoclear ) are generally good enough to clear nasal blockage.
You can use an antihistaminic cough syrup that will also help with nasal discharge. But it's best to get a consult to know share more details on symptoms before prescription.
If she has a history of seizures, you should avoid self medicating.
Next Steps
try nasoclear and seek a consult if she still has nasal blockade or cough and fever.