Sodium Citrate in Smell Retraining for People With Post-COVID-19 Olfactory Dysfunction

This study tests if a nasal spray with **sodium citrate** helps people who lost their sense of smell due to COVID-19. **Sodium citrate** is a type of salt that might help people smell better. People in the study will use either a sodium citrate spray or a normal saline spray (a saltwater solution) and do smell retraining exercises twice a day for 12 weeks. Smell retraining means practicing smelling different scents to try and improve the sense of smell. The study will check if the sodium citrate spray works better than the saline spray.

• **Duration**: 12 weeks with nasal spray use and follow-up tests.
• **Visits**: Participants will have a few check-ins for smell tests using "Sniffin' Sticks".
• **Eligibility**: Must be 18+, with smell loss from COVID-19 for over 3 months.

Participants will be contacted during the study to check for any side effects. It's a chance to try a new method to help get the sense of smell back.