My patient is currently experiencing cold symptoms...

My patient is currently experiencing cold symptoms along with a complete loss of taste for food (ageusia) and smell (anosmia) following a viral upper respiratory infection. I would like to know: (1) What is the expected recovery timeline for anosmia and ageusia following a viral upper respiratory infection? (2) Would taking zinc gluconate 50mg lozenges every 4 hours help accelerate the recovery of taste and smell? Are there any risks or considerations with this zinc supplementation approach?