Do you need a work permit? http://tnma.gov.gh/index.php/thuoc-vialafil-a5ac.pdf thuoc vialafil  Additionally, manufacturers claim that e-cigarettes do not contain the same level of toxins and carcinogens found in traditional cigarettes, cigars and other tobacco products. These claims imply that e-cigarettes are a safe alternative to smoking, even though the health effects of e-cigarettes have not been adequately studied. The lack of regulation puts the public at risk because users of e-cigarettes are inhaling unknown chemicals with unknown effects.