The seven most frequently prescribed classes of psychoactive drugs were antidepressants, stimulants, tranquilizers/antipsychotics, anticonvulsants, hypotensive agents, anxiolytic/sedative/hypnotics, and benzodiazepines. The data on other relevant diagnoses indicate that children and youth are frequently treated with medication under an autism-spectrum diagnosis, even though the target symptoms may be commonly associated with other mental disorders. Age data indicate that about 70% of children with autism-spectrum disorders age 8 yr and up receive some form of psychoactive medication in a given year.
Certainly the debilitating effects are treated with medication, for example the various anxieties that often manifest. I don't know if medication is being used to treat the underlying causes of particular autism cases.
Not directly, no. A range of meds are prescribed for specific manifestations of autism, such as aggression or self-injury, though none are broadly effective.
If there’s an industry making money here, it’s ABA therapy, not pharma.