What Causes Severe Itching On Abdomen While On Calcium Tablets During Pregnancy?

Sir i am 39 week 2 days pregnant and having urine infection and little bit liver infection and my amniotic fluid is low so my dr prescribed me Ferrogen xt Udigal 300 Calcium lactate tablets i.p 300 Optineuron And when i start to have this my tummy itching is start continuosly and i am able to toleraate a single cloth plz help Thanku soso much Waiting for your rply