Symptomatic infantile spasms (West syndrome) is a severe form of childhood epilepsy which presents around 3-6 months of age. It is a difficult epilepsy to control and only 25% of children reach normalcy.
Your neurologist seems to be treating it in the correct manner. He will probably have to increase the doses or substitute another drug if his fits are not controlled. Do carry out occupational therapy and intervention there.
You will need to be patient, as medicines can be increased or substituted gradually. I would suggest you have a frank talk with your neurologist, and he will apprise you the problems you are going to face.