It appears that your brother-in-law has primary lung cancer with metastasis to the liver?  OR … are both the liver and lung cancers secondary to another tumor type, such as colo-rectal cancer?  (Just curious.) 

Please know that most of the chemotherapy agents are metabolized in the liver and excreted via the kidney.  Therefore the liver and renal function of the patient is VITAL to assess and monitor when administering chemotherapy.  It would be ill advised to initiate a therapeutic dose of chemotherapy with a “challenged” liver function. 

There are indeed “alternative” therapies that can be found on the internet and around the world; such as Laetrile, Hoxsey, Kreviozen.  Alternative treatments need to be “metabolized,” as well.  Please refer to the attached link, if you are considering “alternative” therapies:     http://www.quackwatch.org/00AboutQuackwatch/altseek.html

Complementary therapies may prove to be helpful in “conjunction” with the “Gold Standard” National Comprehensive Cancer Network (NCCN) guidelines.  At MDACC we have a Complementary Integrative Medicine Center that works with the Place of Wellness Center.  Please refer to the following attached links.  Perhaps they will be able to provide you with some additional support:

 http://www.mdanderson.org/education-and-research/resources-for-professionals/clinical-tools-and-resources/cimer/index.html

http://www.mdanderson.org/education-and-research/departments-programs-and-labs/programs-centers-institutes/place-of-wellness/index.html

I truly believe that the “issue” at this point of time is to provide your brother-in-law with the BEST Supportive Care possible.  That would to be address management of his symptoms.  Perhaps referral to the Supportive Care Center would be advisable. Here is the access link to this Center: http://www.mdanderson.org/patient-and-cancer-information/care-centers-and-clinics/specialty-and-treatment-centers/supportive-care/index.html