Hi Anshul,
For Wheatgrass as it is a food supplements it will not be a problem to get it in USA.
For rest medicines contact Cooley's anemia
Cooley's Anemia Foundation
330 Seventh Avenue, #900
New York, NY 10001
(800)522-7222
Fax: 212-279-5999
Patient Services Manager
Eileen Scott
eileen.s@cooleysanemia.org
Moreover,
Andy or Sharmin can throw more lights on the topic