Numbness and Tingling Overview of this condition. From Medline Plus. http://www.nlm.nih.gov/medlineplus/ency/article/003206.htm

Anosmia from Intranasal Zinc Administration Discusses evidence that new "homeopathic" nasal congestion remedies containing zinc compounds such as oxymetazoline are associated with a risk of permanent loss of the sense of smell in adults. http://www.coldcure.com/anosmia/anosmia.html