I have been on 60 mg od cymbalata for 2.5 years. I have also been taking the RC opioids Burantyl Fent and Furanyl Fent. The last two days a fog has crept over me like never before. light headedness, dizziness, shivers, sweating, lethargic, paranoia, depression. I would appreciate any advice the forum can give on getting rid of this and making sure it doesn't happen again. in the past of used a spray form of Furanyl Fent and never had this happen. Recently I was forced (due to limited supplies) to use the powder form. Thanks in advance for any feedback.