Did someone prescribe Elcar to anyone?

Did someone prescribe Elcar to anyone? The neurologist prescribed it for prophylaxis because we were born small. We've been taking it for four days and he became somewhat nervous when I rocked him, he tries to crawl on his belly like a baby, legs flailing, he bends over, cries. He used to sleep long but never cried. I think this medication is causing such a reaction in him.