Benzodiazepines: are used in the treatment of anxiety. They are generally tolerated quite well but side effects include headaches, dizziness and tremors.

Calcium channel blockers: are used in the treatment of high blood pressure by relaxing and widening blood vessels. According to the website WebMD they are usually well tolerated but side effects include dizziness, headache and rapid heart rate.

Statins: are increasingly being used in the treatment of high cholesterol. Side effects may include dizziness, headaches, nausea and diarrhea.

Sources:

Calcium channel blockers for high blood pressure. WebMd.com. Retrieved 02/03/2010 from: http://www.webmd.com/hypertension-high-blood-pressure/calcium-channel-blockers-for-high-blood-pressure.

Elliott. C.H. (2009) When Anxiety Isn't Anxiety. Psychcentral.com. Retrieved 02/01/2010 from: http://blogs.psychcentral.com/anxiety/2009/05/when-anxiety-isnt-anxiety/

McCusker RR et al. Caffeine content of energy drinks, carbonated sodas, and other beverages. Journal of Analytical Toxicology. 2006; 30.