Small Sample，Unicentric，Randomized, Controlled Clinical Study of Coenzyme I for Injection in the Treatment of Sudden Sensorineural Hearing Loss

Inclusion Criteria:

1. Age ≥18yrs.the 2019 American Sudden Deafness Guidelines are for patients with suddendeafness over 18 years of age;
2. Patients diagnosed with sudden deafness, i.e. unexplained sensorineural hearing lossoccurring within 72 hours, with hearing threshold ≥30 in at least 3 consecutivefrequencies, refer to the 2019 American Sudden Deafness Guidelines;
3. Unilateral sudden deafness;
4. Within 1 week of the onset of sudden deafness, no treatment in another hospital/ourhospital;
5. No major neurological disease, serious systemic disease, family genetic history, majormental illness;
6. Informed and agreed to join the experiment, no plan to move out or go out within 1month.

Exclusion Criteria:

1. Other diseases such as acoustic neuroma diagnosed by imaging;
2. Those who cannot tolerate NAD+;
3. pregnant；
4. Any other circumstances that the investigator believes should be excluded from thisstudy；
5. Do not agree to join the experiment, plan to move out or go out within 1 month.