Please read this http://www.naturalnews.com/023286_cancer_cancers_health.html
- then PLEASE research, learn & help your dad to reconsider the "experimental drug". ALL "drugs" and allopathic treatments for cancer, weaken/destroy the immune system (many of these drugs are known carcinogens themselves).
Taking more of these drugs will lessen your father's ability to beat this naturally.
Ozone is a good therapy to add to a 'full body program'. One of the best sources of information on CZ regarding the use of ozone is this forum: //www.curezone.org/forums/f.asp?f=980