are there any medical oil which can help a person to relax and calm down like treating anxiety and depression?
Friday, January 22nd, 2010i mean a small bottle of oil can carry around and take it out to smell when i am very anxious and not feeling well the time because my not feeling well are cause by anxiety i am taking high dose of tranquilizere
As Lyn above stated, definitely LAVENDER. Also, CHAMOMILE.
Check out the sites below for lots of information regarding stress / anxiety relieving oils. Some of these sites advice on how to create your own mixture, others provide finished products to purchase.

http://www.cherylsherbs.com/Soothing_stress_with_aromatherapy.htm
http://www.soothing-effects.com/site/1568141/page/745203
http://www.soothingtouch.us/MyOils.html
http://www.soothingsols.com/default.aspx?p=105747
http://www.ehow.com/how_12802_aromatherapy-anxiety.html
I hope you find what you need; best of luck to you !!