My partner has parkinsonism associated with Lewy Body dementia - in other words he has parkinsonian symptoms - tremor in one hand, rigidity, lack of expression, salivary problems etc. We have been using homeopathy for over a year and gradually the symptoms are disappearing. The worst Lewy Body symptoms have completely gone, and currently the tremor is fading.
What is particularly interesting just now is that the homeopathic remedy that is doing a good job is Arsenic - I had read (in the excellent 'Stop Parkin' and Start Living: reversing the symptoms of Parkinson's disease' by John Coleman) that heavy metals in the body could contribute to causing PD. On the off-chance, I asked my partner's family whether he had ever suffered from arsenic poisoning, and indeed he had! So we are continuing with the homeopathic Arsenic, using supplements that aid in detoxing, and following advice in John Coleman's book.
I am so hoping that I will receive a smile some day soon, but who knows!