My husband had bowel cancer op 2weeks ago and while his recovery has so far been remarkable he is suffering major dizziness to the point he has to return to bed. He has not had any post op support so far with no appointments to see doctors until Sept. Could it be low iron or haemoglobin levels still? He is taking one 200mg Ferris sulphate daily. should be increase this? Is there an anti dizzy medication he can take ? It's making him miserable . Any advice would be appreciated.