While we can't see any reason not to, it is always best to check with your doctor or a pharmacist before taking supplements with prescription medication.
However, it is worth noting that anti-depressant medication is safe to take alongside Heights. In fact, much of the research for the use of B vitamins and omega 3 in depression was undertaken alongside anti-depressant medication. While for other treatments, such as ADHD and anxiety, research has shown that many of the nutrients in Heights can make this medication work more effectively too.