Venlafaxine is a type of anti-depressant drug, which is sold under a variety of brand names including Effexor.
It is part of a group of drugs called selective serotonin and norepinephrine reuptake inhibitors (SSNRIs).
It is used to treat major depressive disorder, anxiety, and panic disorder.
Venlafaxine is sometimes used to treat people on the autism spectrum who have mental health problems.
It may also be used to treat people on the autism spectrum who have other problems, such as repetitive behaviours or social deficits.