Toprol-XL and urge

This website may not have saved my life, but it has certainly saved my sanity. Beginning in May 2007 I was prescribed Toprol XL for a supposed heart condition. I was instructed to begin with 50 mg per day and go to 100 mg per day after 10 days. Since I already had the 50 mg tablets, I simply started taking 2 of them together when I raised the dosage. On July 25 I ran out of the 50 mg tabs and filled a prescription for 100 mg tabs. Immediately upon starting the 100 mg tabs I began experiencing side effects which increased in severity daily. By Monday July 30 I was convinced I was losing my mind. Then I discovered this website, and read that many other people had suffered in the same way. What I have trouble grasping is why the same dosage had different effects. I tolerated the 100 mg/day dose just fine when taking 2 50 mg tabs, but the 100 mg was dreadful. I've checked the pills, and both the 50 mg and 100 mg are Astra-Zeneca products, not generic. The markings, shape and size are consistent with 100 mg tabs, so I haven't been inadvertently given an overdose. I immediately backed off the dosage, and am gradually going to reduce and stop the medication. I urge anyone who is having these problems not to stop at reporting them here, but also to contact Astra-Zeneca at www.astrazeneca.com, and to report them to the FDA's Medwatch website, www.fda.gov/medwatch. It may seem fruitless to contact Astra Zeneca, but they need to be made aware of these problems.

I have had vivid dreams almost every night. Some are disturbing. I also have a constant urge to eat. I have had some dizzy spells too. I think I am going to stop taking it.