Vitamin deficient is most commonly seen in a pregnant mother who is on phenytoin therapy for epilepsy?
Phenytoin interferes with metabolism of folate and patients taking phenytoin may become deficient in folic acid. Phenytoin decreases absorption of folic acid and increases its excretion. Ref: Advanced Therapy in Epilepsy By Wheless, James W. Wheless, James Willmore, Roger A. Brumback, 2009, Page 259.
Vitamin B6
Vitamin B12
Vitamin A
Folic acid