Is there any medicine for autistics?

No Cure. If you mean to cure, no. To alleviate symptoms, sometimes yes. For example there are medications to help insomnia. Also aggressive behavior. Check with your pediatrician for help.
Autism medication. There is no medication for autism. The best treatment is therapy. But sometimes medication is given for some of the other conditions associated with autism such as- hyperactivity, aggression, disruptive behavior.
No but. There are medications that can help some symptoms or problems that people with autism have. Abilify (aripiprazole) and Risperdal are specifically approved by the fda for children and adolescents with autism to help with aggression or other disruptive behaviors. Sometimes stimulants and blood pressure medicine like Clonidine are used to help hyperactivity and sometimes anxiety medicaments are used for anxiety.