The study aimed to investigate the efficacy of insulin in a new dosage form ( fast dissolving film) in treatment of anosmia in patients post infested with Covid-19. The study implication based in two methods evaluations

1. Threshold test
2. identification test.

This study was designed to improve smell disorders after corona infection that is very anxious for all patients.

Inclusion criteria were loss of smell, post covid-19 infection, age from 18 to 70 years and accept sharing and follow up.

The application of dosage form by ENT specialist at otorhinolaryngology clinic at Minia University hospital. Dose was 100iu of insulin 3 times weekly for 4 weeks. The new dosage form with insulin was compared with a placebo to ensure statistical improvement.

The tests were performed in each visit. Primary outcome was the improvement of smell sensors in those patients

Inclusion Criteria:

• anosmia post covid-19 infection

Exclusion Criteria:

• nasal polyps or fractions or syrgery in nose from 6 months or less