Asked for male, 74 years old from Hyderabad
Yes, you can stop and give him ashwashila capsules of patanjali, fresh fruits, fruit juices, vegetables (raw or cooked or boiled), vegetable juices, sprouts, nuts, dry fruits, honey, milk, ghee, fresh butter, and buttermilk are the best to increase sattva and enrich the mind.
Try to cut down, or if possible stop, the use of black tea, coffee, white flour products, chocolates, white sugar products, deep fried foods, hot spices, meat, fish, and eggs. Such restrictions benefit in anxiety disorders.
Breathing exercises: mind has a very close relation with breathing. A person has short and shallow breathing when anxious or stressed and has deep breathing when relaxed and happy. Next time he become stressed, tell him to watch his breathing.