Hi thanks for your answer. Todas is my first appointment with Sleep Medicine expert at Mayo. I will discuss my options. But the last time I came they told me that the protocol for rem sleep disorder is to use melatonin on the long term. People who experience VIVID DREAMS or HALLUCINATIONS while on melatonin usually last 2 months & that after 2 months these symptoms dissappear. I was wondering if theres somebody here that experienced this awful side effect of melatonin and if they find a way to take it in order to avoid the awful vivid dreams