Parkinson's Syndrome and Edox

After successful robotic prostate surgery 18 months ago, my husband was diagnosed with Lymphoma this past January, successful chemo treatment, and now diagnosed with Parkinson's Syndrome, which seemed to manifest itself after chemo started.  His prostate surgeon suggested a supplement for ED called EDOX.  We ordered, and it was very successful with no problems.  He stopped when he was diagnosed with Lymphoma and chemo began.  Now, he is beginning PS drug therapy with a generic for Sinemet -- low dosage, three times a day.  He is also on Lexapro (from chemo) for one more month.  Has anyone out there taken both the EDOX and the Sinemet? Not so worried about Lexapro -- it will be gone in four weeks.  Any similar experiences?  We are trying to get our lives back on track and nobody will offer a judgement, since EDOX is an unregulated supplement.  Thanks!!!