Warning! Little Side Effects?!?!

Are there any side effects?  

All sources indicate that LDN has virtually no side effects.  Some patients report vivid dreams, and occasionally, during the first week of use, patients may complain of difficulty sleeping.  (Reports indicate that sleep disturbance is rare, occurring in less than 2% of users.)  If this persists after the first week, dosage can be reduced from 4.5mg to 3mg. At both high and low dosages, patients taking Naltrexone usually say they are largely unaware of being on medication.  Naltrexone usually has no psychological effects and patients (at both high and low dosages) don't feel either "high" or "down" while they are on naltrexone.  It is not addicting.
  - Lowdosenaltrexone.org