Hi..yes it is pretty safe. Rather , the side effects of chemicals will be lesser as per our observations. Unfortunately we are not working on integrated system yet. The US has started doing it. Very soon you will see . . the trend will come in India too :).

Ayurvedic medicines that you have stated are definitely safe and will definitely help your brother in improving the quality of life and mental stability. You can practice nasya ( nasal oilation) with cow ghee or jyotishmati oil at night. Shirodhara (oil) or takradhara ( buttermilk) also helps and are completely safe with modern allopathic drugs.