Hmm, ang tummy ache after meds could be normal lalo na pag prenatal vitamins with iron, yun talaga ang common culprit, napupoop talaga usually dahil dito. But if it's happening consistently or sobrang sakit na, better to mention it sa OB mo next visit para ma-adjust siya either ng dosage, timing, or type of prenatal na less harsh sa stomach mo, some moms din namin nag-switch to different brands or iniinom after heavy meal para mas okay ang tummy.