The age of patients ranged between 18 and 40 years. |
Endoscopic or
radiological evidence of nasal polyposis patients included in patients
with pre-existing olfactory dysfunction, rhinitis, rhinosinusitis, and
other upper respiratory tract symptoms. |
Patients with COVID-19 ˂ 12 weeks. |
Corticosteroid use (nasal, oral, or
intravenous) since positive COVID-19 swab. |
Negative Polymerase Chain Reaction (PCR) |
Pregnant or breast-feeding
females. |
Patients presented with loss of smell with or without taste
> 4 weeks. |
History of neurodegenerative disease (ie.
Alzheimer’s dementia, parkinson’s disease, frontotemporal
dementia). |
|
History of an allergic reaction to theophylline or vitamin
A. |
|
Patients with vitamin A, steroid and theophylline dependence for
comorbid conditions such as asthma and COPD (nasal or
systemic). |