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.
HOW TO USE: Take this medication by mouth 1 to 2 times daily as directed on the product package. If your doctor has prescribed this medication, take it exactly as directed. If taking 1 dose a day, take it at bedtime. Take each dose with a large glass of liquid (8 ounces or 240 milliliters). Do not chew tablets or capsules.If you are using the liquid form, use a medication measuring device to carefully measure the dose.