The 35-year-old woman with advanced cancer had been travelling via Abu Dhabi airport when her health deteriorated.
When medics tried to resuscitate her, the patient had shown signs that may have been consistent with the Ebola virus.
(READ MORE: Third person dies of Ebola fever in Nigeria)
"Some of her signs during resuscitation, although explainable by her medical condition, could also have been caused by Ebola virus, and hence this diagnosis needed to be excluded," the authority said in a statement according to the state WAM news agency on Thursday.
(READ MORE: Nigeria now has 12 Ebola cases, 5 recovered)
At the time, the patient's husband and the five medics who tried to resuscitate her were put in isolation. The Health Authority said none of them had shown any symptoms.
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"Given the negative result, all these are individuals are scheduled to be released from isolation today (Thursday)," the statement added.