“…While this study was not powered to investigate effects on treatment success, many abused drugs are known to increase smoking rates (e.g., cocaine, Roll, Higgins, & Tidey, 1997;alcohol, Griffiths, Bigelow, & Liebson, 1976;opioids, Mello et al, 1980) and interfere with quit attempts in nonpregnant populations (Richter, Ahluwalia, Mosier, Nazir, & Ahluwalia, 2002;Stapleton, Keaney, & Sutherland, 2009), although marijuana use has not been demonstrated to do so (Nemeth-Coslett, Henningfield, O'Keeffe, & Griffiths, 1986). However, we know of one study where marijuana use was correlated with failure to quit smoking during pregnancy (Haskins, Bertone-Johnson, Pekow, Carbone, & Chasan-Taber, 2010).…”