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

Those randomized to the Sodium Citrate arm will use 1 mL of 2.5% sodium citrate (3.5g/140 mL, pH 7.4, 298 mOsmol/L), 0.5 mL in each nostril, twice a day via an atomizer followed by olfactory training.

Those randomized to the Normal Saline arm will use 1 mL of normal saline, 0.5 mL in each nostril, twice a day via an atomizer followed by olfactory training.

All participants, regardless of study arm they are randomized to, will participate in olfactory training twice a day after use of their nasal spray