If you are asking if it has been successful with the person in the original message, I do not know and cannot answer.  If you are asking if oleander has been successful in general, the answer is a resounding YES!  Dr. Ozel in Turkey (who devised the original patented oleander extract Anvirzel) has used it for over 40 years with thousands of patients and has reported an overall success rate of over 70% - which I find remarkable considering that he has used it either after conventional medicine has failed or else as an adjunct to conventional medicine and has pretty much used it as a sole item and not with all the other natural items normally recommended for an oleander-based protocol.

Naturopathic PhD Marc Swanepoel, who devised the Sutherlandia OPC oleander-based line of supplements, has loosely tracked thousands of users of his supplement line and reports that his best estimates over the past half-dozen or so years are that it has been successful about 85% of the time with Stage III and IV cancers and 95% of the time with stage I and II cancers.  From what we can tell in our Yahoo Oleandersoup group of over 2600 members, those percentages look pretty accurate.

Provided that a person has more than a few scant weeks estimated survival and that their body and immune system have  not been virtually destroyed by conventional chemo/radiation, a good overall anti-cancer protocol which has oleander as a centerpiece should be successful most of the time.