The accuracy and completeness of drug information in Google snippet blocks




Internet, pharmacists, drug information, patient care, search engine


Introduction: Consumers commonly use the Internet for immediate drug information. In 2014, Google introduced the snippet block to programmatically search available websites to answer a question entered into the search engine without the need for the user to enter any websites. This study compared the accuracy and completeness of drug information found in Google snippet blocks to US Food and Drug Administration (FDA) medication guides.

Methods: Ten outpatient drugs were selected from the 2018 Clinical Drugstats Database Medical Expenditure Panel Survey. Six questions in the medication guide for each drug were entered into the Google search engine to find the snippet block. The accuracy and completeness of drug information in the Google snippet block were quantified by two different pharmacists using a scoring system of 1 (less than 25% accurate/complete information) to 5 (100% accurate/complete information). Descriptive statistics were used to summarize the scores.

Results: For five out of the six questions, the information in the Google snippets had less than 50% accuracy and completeness compared to the medication guides. The average accuracy and completeness scores of the Google snippets were highest for “What are the ingredients of [the drug]?” with scores of 3.38 (51–75%) and 3.00 (51–75%), respectively. The question on “How to take [drug]?” had the lowest score with averages of 1.00 (<25%) for both accuracy and completeness.

Conclusion: Google snippets provide inaccurate and incomplete drug information when compared to FDA-approved drug medication guides. This aspect may cause patient harm; therefore, it is imperative for health care and health information professionals to provide reliable drug resources to patients and consumers if written information may be needed.

Author Biography

Cambrey Nguyen, University of Kansas School of Pharmacy

Clinical Assistant Professor, Drug Information

Pharmacy Practice


InternetLiveStats. Google search statistics [Internet]. InternetLiveStats [rev. 2021; cited February 2021]. <>.

Pew Research Center. Health online 2013 [Internet]. The Center; Jan 2013 [cited 15 February 2021]. <>.

Smith DA. Situating Wikipedia as a health information resource in various contexts: a scoping review. PLoS One. 2020 Feb 18;15(2):e0228786. DOI:

Google. Featured snippets and your website [Internet]. Google; 2021 [cited 16 February 2021]. <>.

Margolis J. Seeking online medical advice? Google's top results aren't always on target [Internet]. National Public Radio; Jul 2017 [cited 15 February 2021]. <>.

Scull A. Dr. Google will see you now: Google's health information previews and implications for consumer health. Med Ref Serv Q. 2020 Apr-Jun;39(2):165–73. DOI:

Clauson KA, Polen HH, Boulos MN, Dzenowagis JH. Scope, completeness, and accuracy of drug information in Wikipedia. Ann Pharmacother. 2008 Dec;42(12):1814–21. DOI:

Reilly T, Jackson W, Berger V, Candelario D. Accuracy and completeness of drug information in Wikipedia medication monographs. J Am Pharm Assoc (2003). 2017 Mar-Apr;57(2):193–6.e1. DOI:

Candelario DM, Vazquez V, Jackson W, Reilly T. Completeness, accuracy, and readability of Wikipedia as a reference for patient medication information. J Am Pharm Assoc. 2017 Mar-Apr;57(2):197–200.e1. DOI:

Beaton C, Codd RJ, Holland PA, Gateley CA. Evaluation of the quality and accuracy of information regarding aromatase inhibitors available on the internet. Breast J. 2008 Jul-Aug;14(4):366–8. DOI:

US Food and Drug Administration. Drug safety and availability - Medication guides [Internet]. The Administration; 2021 [cited 16 February 2021]. <>.

Medication Guide for Prescription Drug Products: Subpart B-General Requirements for a Medication Guide, 21 C.F.R. Sect. 208 (2020).






Original Investigation