What function has sodium bicarbonate in the following preparation: Vit A 300 KE Eucalyptol 0.5 g after bicarbonate 0.5 g Ph-efrine HCl 75 mg almond oil 5g white Vaseline 25g

We have to do here with a nose ointment. Sodium bicarbonate is added to set the pH of the moisture at the height of the nasal mucosa and neutralize the slightly acidic nature of the Ph-Efrine HCl.