{"id":73,"date":"2013-12-24T20:48:25","date_gmt":"2013-12-24T20:48:25","guid":{"rendered":"http:\/\/eurekainfomed.it\/?p=73"},"modified":"2026-07-30T14:03:58","modified_gmt":"2026-07-30T14:03:58","slug":"smoking-a-good-reason-to-quit","status":"publish","type":"post","link":"https:\/\/eurekainfomed.it\/en\/smoking-a-good-reason-to-quit\/","title":{"rendered":"Smoking: a good reason to quit"},"content":{"rendered":"

Smokers have a significantly higher risk of experiencing adverse drug reactions<\/strong> compared with non-smokers. This increased risk is largely due to the interaction between the more than 4,000 substances found in tobacco smoke and the medications being taken.<\/p>\n

\n

Tobacco smoking can alter both the effectiveness and tolerability of many medicines<\/strong> by affecting their pharmacodynamic and pharmacokinetic properties.<\/p>\n

Drug-smoking interactions<\/h2>\n

As explained in an article published by Focus Farmacovigilanza<\/a> drug-smoking interactions are primarily caused by the effects of tobacco smoke on the activity of cytochrome P450 metabolic enzymes<\/strong>.<\/p>\n

\n

The best-known effect of smoking is the induction of the CYP1A2 isoenzyme<\/strong>, which increases the metabolism of drugs processed by this enzyme. As a result, plasma concentrations of the active substance may decrease, potentially reducing the medication’s therapeutic effect.<\/p>\n

One example is the antipsychotic drug clozapine<\/strong>. Smoking between 7 and 12 cigarettes per day is sufficient to achieve maximum enzyme induction and may require a 50% increase in the clozapine dose<\/strong> to maintain adequate plasma concentrations and clinical efficacy.<\/p>\n

Conversely, when a patient stops smoking, CYP1A2 activity gradually returns to near-normal levels. Therefore, in individuals receiving antipsychotic treatment, medication doses may need to be adjusted following smoking cessation to avoid excessive drug exposure.<\/p>\n

Similar situations can occur with other medications, including treatments used for cardiovascular diseases<\/strong>. According to data published in a recent meta-analysis, the dosage of warfarin<\/strong> may need to be approximately 12% higher in smokers<\/strong> than in non-smokers.<\/p>\n

Understanding these interactions is important for ensuring safe and effective treatment, highlighting yet another reason why smoking cessation can have significant health benefits.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Smokers have a significantly higher risk of experiencing adverse drug reactions compared with non-smokers. This increased risk is largely due to the interaction between the more than 4,000 substances found…<\/p>\n","protected":false},"author":1,"featured_media":374,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25,4],"tags":[],"class_list":["post-73","post","type-post","status-publish","format-standard","has-post-thumbnail","category-pharmacovigilance","category-news"],"yoast_head":"\nSmoking: a good reason to quit<\/title>\n<meta name=\"description\" content=\"Smoking increases the risk of adverse drug reactions. 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