tukar ubat ?

Hi kawan2...mau tya ba sbb ni 1st baby...kan kita dbgi 4 jnis ubat dr doktor utk mkn...klu ganti dgn obimin ok ka tu? Sbb ni 1st baby takut ada apa2...sbb klu mkn ubat tu tmbh mual2 n lemas bdn oo, perlu inform doktor?