FDA, FDA Drug Safety Communication: Chantix (varenicline) may increase the risk of certain cardiovascular adverse events in patients with cardiovascular disease, 16 June 2011.
另外服食藥物會出現血液中含雙倍劑量或減慢藥物排走,If you have severe kidney problems you should not take cimetidine in combination with this medicine, as it may increase the amount of varenicline in the blood.
The components of tobacco smoke can cause certain medicines, for example those listed below, to be removed from the body faster than normal. When you stop smoking, they are removed slower, so their blood levels may increase. This means that if you are taking any of these medicines, your doses may need adjusting after you stop smoking:
clozapine
dextropropoxyphene
flecainide
fluvoxamine
olanzapine
pentazocine
phenylbutazone
some benzodiazepines, eg oxazepam
some beta-blockers, eg propranolol
tacrine
theophylline
tricyclic antidepressants, such as imipramine
warfarin.
People with diabetes who smoke normally need more insulin, as smoking reduces the amount of insulin that is absorbed into the blood from an injection under the skin. If you have diabetes and are giving up smoking, you may subsequently need a reduction in your insulin dose. Discuss this with your doctor.