Peppermint and ginger are both things that help settle an upset stomach. I would suggest looking into a quality loose tisane (or even making your own) with one or both of these two things because the teabags you buy in the store are either going to be flavored, old or just bad quality.
OID - Medication once a day [Internet]; August 7, 2016 [cited 2016 AUG 7]. Available from: https://www.allacronyms.com/OID/Medication_once_a_day. 'OID - Medication once a day', All Acronyms, 7 August 2016, <https://www.allacronyms.com/OID/Medication_once_a_day> [accessed 7 August 2016] All Acronyms, OID - Medication once a day (Aug. 7, 2016, 4:08 PM), available at https://www.allacronyms.com/OID/Medication_once_a_day.
Stimulants are the most commonly used type of ADHD medicine. Some medicines are taken more than one time a day, while others are taken only once a day. Your provider will decide which medicine is best. Know the name and dose of each medicine you take.