Thanks for posting your query here.
Infarct suggest that particular portion of brain is not receiving enough blood supply. Outcome of these in a preterm baby is difficult to predict as there is some element of brain growth and development which minimizes the effect of the insult.
medication, usually it is given for a period of few months and then assessment should be done by Pediatrician
or Pediatric Neurologist
to decide whether it needs to be continued further longer or not. It is usually a safe medication, given in appropriate dosage.
You have not mentioned whether your baby was preterm or not and at what gestation was it born. Head Circumference can only be commented when the maturity at birth is known and then plotting it serially on the growth charts for preterm babies. You should be able to discuss this with your Pediatrician or Neurologist.
Please do come back with your answers.
Dr Tejas Shah