You use pre-prandial to refer to things you do or have before a meal.
[formal]
...pre-prandial drinks.
Examples of 'pre-prandial' in a sentence
pre-prandial
Most of our cases were symptomatic, and the most common presentation was with pre-prandial hypoglycemia.
Manjunath Ganesh Anakal, Pramila Kalra, Mala Dharmalingam, S Indushekhar, VenkateshRao, K M Prasanna Kumar 2014, 'Insulinoma case series: Experience of a tertiary care center', Indian Journal of Endocrinology and Metabolismhttp://www.ijem.in/article.asp?issn=2230-8210;year=2014;volume=18;issue=6;spage=858;epage=862;aulast=Anakal. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
On the 6 meal schedule, pre-prandial activity and body temperature were poorly correlated, suggesting independent regulation.
Matthew D. Luby, Cynthia T. Hsu, Scott A. Shuster, Christian M. Gallardo, Ralph E.Mistlberger, Oliver D. King, Andrew D. Steele 2012, 'Food Anticipatory Activity Behavior of Mice across a Wide Range of Circadian and Non-CircadianIntervals', PLoS ONE10.1371/journal.pone.0037992. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)