User reviews for Cold-Eeze are mixed, as of June 2015, with an average of 3.8 out of 5. About 58 percent of Amazon.com users gave the product a 5-star review, with the most common complaint being the strong and unpleasant taste of the drops.
Other reviews include those from WebMD, where users provide an average score of 3.6 out of 5; over half of the users enthusiastically claim the product was effective for them. However, some users experienced no significant benefit from using the drops. Similar reviews are on Drugstore.com, where the most common complaints among those dissatisfied with the product were a bad taste and nausea.