Helicobacter pylori infects half the global population. Because serious complications can result from this infection, a so-called "triple therapy" is recommended: treatment with a proton-pump inhibitor and clarithromycin, along with amoxicillin or metronidazole. Although these antibiotics have been associated with neuropsychiatric symptoms, it is difficult to disentangle the effects of antibiotics from the effects of acute infections that may precipitate acute neuropsychiatric symptoms. Study of patients with chronic H. pylori infections who undergo antibiotic treatment may provide a clearer view of the associations between acute neuropsychiatric symptoms and antibiotics. The literature concerning this association in patients with H. pylori has not been reviewed. We therefore undertook a review of MEDLINE and postmarket surveillance data concerning this issue and identified 25 cases. Postmarket data indicated that gastrointestinal symptoms were the most commonly reported adverse reactions, followed by neurological adverse reactions; neuropsychiatric symptoms were less commonly reported, with variable and nonspecific terminology used to describe them. More specific, yet still variable terminology was found in the literature. Anxiety, delirium, dissociation, mania, and psychosis were reported, with approximately half of these neuropsychiatric symptoms occurring without symptoms of delirium. The use of standardized neuropsychiatric symptom rating scales and the Confusion Assessment Method for monitoring adverse reactions may improve our knowledge of neuropsychiatric symptoms and their association with antibiotics and thus mitigate underreporting. Physicians should remain alert to the possibility that neuropsychiatric symptoms may occur during antibiotic treatment of H. pylori and recognize that rapid resolution typically occurs with discontinuation of the antibiotics.
Tobacco addiction is the leading cost of preventable morbidity and mortality in the western world. Substance use (SUD) and psychiatric (PD) disorders are important contributors to the high rates of tobacco addiction, and smokers with these comorbidities demonstrate lower rates of quitting compared with smokers in the general population. This article will review reasons for the high rates of co-occurring SUDs and PDs in people with tobacco addiction, and propose approaches to their assessment and treatment based on the recent literature. The recognition of SUDs and PDs in tobacco smokers is an important goal for all clinicians treating tobacco addiction, and an approach that integrates these treatments leads to optimal treatment outcomes for this important subset of tobacco smokers.
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