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Table 7. Varenicline

 Brand Dose Side Effects Warning/Precaution 
d = day; Rx = prescription; wk = week.
RxChantix0.5 mg/d, d 1–3; 0.5 mg twice a d, d 4–7; then 1.0 mg twice a d through wk 12Nausea, insomniaRisk of toxicity greater in patients with impaired renal function
Not tested in children and pregnant women