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. Author manuscript; available in PMC: 2014 Aug 5.
Published in final edited form as: Addiction. 2011 Nov 15;107(2):361–369. doi: 10.1111/j.1360-0443.2011.03619.x

Table 3.

Most often occurring adverse events (incidencea) by medication group.

Event Experimental Placebo Total
Headache 19 15 34
Cold/flu/fever/cough 3 12 15
Back pain 7 4 11
Sleep problems/insomnia 8 1 9
Tingling/numbness 5 3 8
Depression 2 4 6
Hot flashes 0 6 6
Dizziness/lightheaded 1 4 5
Nausea/vomiting 2 3 5
Anxiety 1 3 4
Sinus/allergy 3 1 4
Toothache 1 3 4
Leg/arm pain 2 1 3
Pain 2 1 3
Panic attacks 2 1 3
a

Incidence is defined as the reporting of the symptom at any time during the trial; 62 participants reported adverse events (AEs).