Complete or severe loss of the subjective sense of smell. Loss of smell may be caused by many factors such as a cold, allergy, OLFACTORY NERVE DISEASES, viral RESPIRATORY TRACT INFECTIONS (e.g., COVID-19), aging and various neurological disorders (e.g., ALZHEIMER DISEASE).
Phase 4 trials (3)
Phase 3 trials (6)
Phase 2 trials (8)
Other trials (2)