Encourage Medical Treatment
If you see anxiety interfering with your friend's life, encourage him or her to seek help from a mental health professional. If your friend is already receiving treatment, encourage him to continue with treatment, reminding him to keep appointments, take medication and follow instructions. Cognitive behavioral therapy is one of the most effective treatments for anxiety disorders. If your friend is not utilizing this type of treatment, offer to help in finding a professional. Treatment may also involve practicing relaxation techniques or taking steps outside of therapy. You may offer to come to sessions with your friend and talk with the therapist on ways you can help in between sessions.
Don't Be Judgmental
Each person with anxiety is different, each will react to treatment on their own timetable. Don't express your opinion that your friend should be further along in treatment or have made more progress. Don't judge their feelings of anxiety as not important or minimize their struggles. Listening, without judging, is best.
Take Care of Yourself
You may get so involved in trying to care for your friend that you ignore your own needs. Be sure to take care of yourself, including finding a support network to help you talk about your emotional reaction to your friend. Allow yourself to take a break if you need one. An emotionally exhausted friend usually isn't much help. Be sure to eat right, get enough sleep and exercise every day to help relieve the stress of helping your friend learn to manage anxiety.