Ay sis, nausea talaga ang common side effect ng Duphaston especially pag fresh start mo pa lang, pero ang intense nausea mo parang sobra na, better to message your OB ulit about it kasi baka kailangan i-adjust ang dosage or timing mo, or change the med altogether kung hindi mo talaga kaya. A few of us tried Duphaston and nag-lightheaded din, pero hindi to level ng "di kakapit" mo every time, so don't power through kung parang hindi sustainable talaga, your OB might suggest taking it with food, or before bed, or may alternative na better for you. Hugs, hopefully makakuha ng solution na hindi ka masisira!