I too never epeereinced stomach issues until Tymlos. Now that said, I dont drink caffeine, alcohol, or eat tomates or pungent foods - so I am careful with my diet.
Tymlos side effects for me, were upper stomach pain, aggressive belching, food sitting in my throat, excessive spit ( I neve spit!) and medicinal tast in my mouth. I was losing weight.
I contcated an ayurvedic phyisican who helped me manage my symptoms so I could continue the medication. It took a few months to figure out, but I now an ok on tymlos as long as I take the herbal formulations for digestive support. Side effects in many cases point to an imblance that is already there and is unmaksed due to the stresses of the new medication. There is no one size fits all solution but effort and a good fuctional doctor can work with you and help support the body in dealing with medicines.