An elderly client with a history of COPD is having difficulty sleeping and does not wish to see a medical practitioner.Which of the following strategies should the nurse discourage the client from using,or urge him to see a physician before beginning the therapy? The client has not used any of these therapies in the past.Select all that apply.

A) Aromatherapy
B) T'ai chi
C) Yoga
D) Melatonin

Aromatherapy is known to be safe,and may be effective.Tai chi is safe for older adults,and may be effective for sleep.Yoga is possibly effective for sleep,but it is physically rigorous,so it has the potential to be harmful for older adults,who may have a variety of chronic conditions.The client should see a physician before beginning yoga.Melatonin is effective for certain sleep disorders,but it does interact with several prescription drugs.Therefore,the client should not take melatonin without consulting a physician.