Tobacco and smoking interactions

Smoke (not nicotine itself) induces the CYP1A2 enzyme, lowering blood levels of some drugs; quitting can then push those levels up.

Tobacco and smoking has 54 documented interactions across the FDA labels and fact sheets we index: 10 major, 38 moderate, 6 minor, and 0 where a label reports no significant interaction. Each entry below quotes the sentence behind it. This tobacco and cannabis page is a starting point, not a verdict for your situation.

Major interactions (10)

  • Calcipotrienevitamin D analogMajor

    Instruct the patient the avoid fire, flame, and smoking during and immediately following application. (Calcipotriene label, Warnings and precautions)

  • Drospirenone and ethinyl estradioloral contraceptiveMajor

    WARNING: CIGARETTE SMOKING AND SERIOUS CARDIOVASCULAR EVENTS Cigarette smoking increases the risk of serious cardiovascular events from combination oral contraceptives (COC) use. (Drospirenone and ethinyl estradiol label, Boxed warning)

  • Econazoleazole antifungalMajor

    Instruct the patient to avoid heat, flame, and/or smoking during and immediately following application. (Econazole label, Warnings and precautions)

  • WARNING: CIGARETTE SMOKING AND SERIOUS CARDIOVASCULAR EVENTS Cigarette smoking increases the risk of serious cardiovascular events from combined hormonal contraceptive (CHC) use. (Levonorgestrel and ethinyl estradiol label, Boxed warning)

  • WARNING: CIGARETTE SMOKING AND SERIOUS CARDIOVASCULAR EVENTS Cigarette smoking increases the risk of serious cardiovascular events from combination oral contraceptive (COC ) use. (Norethindrone and ethinyl estradiol label, Boxed warning)

  • Norgestimate and ethinyl estradioloral contraceptiveMajor

    WARNING: CIGARETTE SMOKING and SERIOUS CARDIOVASCULAR EVENTS WARNING: CIGARETTE SMOKING and SERIOUS CARDIOVASCULAR EVENTS See full prescribing information for complete boxed warning. ● Mono-Linyah is contraindicated in women over 35 years old who smoke. (Norgestimate and ethinyl estradiol label, Boxed warning)

  • PhenelzineMAO inhibitorMajor

    Therefore, patients being treated with phenelzine sulfate should avoid high protein food that has undergone protein breakdown by aging, fermentation, pickling, smoking, or bacterial contamination. (Phenelzine label, Contraindications)

  • TofacitinibimmunosuppressantMajor

    Patients who are current or past smokers are at additional increased risk. (Tofacitinib label, Boxed warning)

  • UpadacitinibimmunosuppressantMajor

    Patients who are current or past smokers are at additional increased risk [see Warnings and Precautions ( 5.3 )] . (Upadacitinib label, Boxed warning)

  • In a smoking cessation trial in patients with stable CV disease, CV events were infrequent overall; however, nonfatal myocardial infarction (MI) and nonfatal stroke occurred more frequently in patients treated with CHANTIX compared to placebo. (Varenicline label, Warnings and precautions)

Moderate interactions (38)

  • AbataceptimmunosuppressantModerate

    When receiving intravenous ORENCIA, patients that require blood glucose monitoring should be advised to consider methods that do not react with maltose, such as those based on glucose dehydrogenase nicotine adenine dinucleotide (GDH-NAD), glucose oxidase, or glucose hexokinase test methods. (Abatacept label, Drug interactions)

  • AdalimumabimmunosuppressantModerate

    In controlled trials of other TNF blockers in adult patients at higher risk for malignancies (i.e., patients with COPD with a significant smoking history and cyclophosphamide-treated patients with Wegener’s granulomatosis), a greater portion of malignancies occurred in the TNF blocker group compared to the control group. (Adalimumab label, Warnings and precautions)

  • BudesonidecorticosteroidModerate

    Patients with major risk factors for decreased bone mineral content, such as prolonged immobilization, family history of osteoporosis, post menopausal status, tobacco use, advance age, poor nutrition, or chronic use of drugs that can reduce bone mass (e.g., anticonvulsants, oral corticosteroids) should be monitored and treated with established standards of care. (Budesonide label, Warnings and precautions)

  • Budesonide and formoterolcorticosteroidModerate

    Patients with major risk factors for decreased bone mineral content, such as prolonged immobilization, family history of osteoporosis, postmenopausal status, tobacco use, advanced age, poor nutrition, or chronic use of drugs that can reduce bone mass (e.g., anticonvulsants, oral corticosteroids) should be monitored and treated with established standards of care. (Budesonide and formoterol label, Warnings and precautions)

  • BupropionantidepressantModerate

    Monitoring of blood pressure is recommended in patients who receive the combination of bupropion and nicotine replacement. (Bupropion label, Warnings and precautions)

  • CelecoxibNSAIDModerate

    Other factors that increase the risk of GI bleeding in patients treated with NSAIDs include longer duration of NSAID therapy; concomitant use of oral corticosteroids, antiplatelet drugs (such as aspirin), anticoagulants; or selective serotonin reuptake inhibitors (SSRIs); smoking; use of alcohol; older age; and poor general health status. (Celecoxib label, Warnings and precautions)

  • ClozapineantipsychoticModerate

    • Discontinuation of CYP1A2 or CYP3A4 Inducers: Consider reducing CLOZARIL dose when CYP1A2 inducers (e.g., tobacco smoke) or CYP3A4 inducers (e.g., carbamazepine) are discontinued. (Clozapine label, Drug interactions)

  • Conjugated estrogensestrogenModerate

    Risk factors for arterial vascular disease (for example, hypertension, diabetes mellitus, tobacco use, hypercholesterolemia, and obesity) and/or venous thromboembolism (VTE) (for example, personal history or family history of VTE, obesity, and systemic lupus erythematosus) should be managed appropriately. a. (Conjugated estrogens label, Warnings)

  • DiclofenacNSAIDModerate

    Other factors that increase the risk of GI bleeding in patients treated with NSAIDs include longer duration of NSAID therapy; concomitant use of oral corticosteroids, aspirin, anticoagulants, or selective serotonin reuptake inhibitors (SSRIs); smoking; use of alcohol; older age; and poor general health status. (Diclofenac label, Warnings and precautions)

  • EletriptantriptanModerate

    Perform a cardiovascular evaluation in triptan-naïve patients who have multiple cardiovascular risk factors (e.g., increased age, diabetes, hypertension, smoking, obesity, strong family history of CAD) prior to receiving RELPAX. (Eletriptan label, Warnings and precautions)

  • EstradiolestrogenModerate

    Risk factors for arterial vascular disease (e.g., hypertension, diabetes mellitus, tobacco use, hypercholesterolemia, and obesity) and/or venous thromboembolism (e.g., personal history or family history of VTE, obesity, and systemic lupus erythematosus) should be managed appropriately. a. (Estradiol label, Warnings)

  • EtodolacNSAIDModerate

    Other factors that increase the risk for GI bleeding in patients treated with NSAIDs include concomitant use of oral corticosteroids or anticoagulants, longer duration of NSAID therapy, smoking, use of alcohol, older age, and poor general health status. (Etodolac label, Warnings)

  • FluticasonecorticosteroidModerate

    Patients with major risk factors for decreased bone mineral content, such as prolonged immobilization, family history of osteoporosis, postmenopausal status, tobacco use, advanced age, poor nutrition, or chronic use of drugs that can reduce bone mass (e.g., anticonvulsants, oral corticosteroids), should be monitored and treated with established standards of care. (Fluticasone label, Warnings and precautions)

  • FluvoxamineSSRIModerate

    Theophylline: The effect of steady-state fluvoxamine (50 mg bid) on the pharmacokinetics of a single dose of theophylline (375 mg as 442 mg aminophylline) was evaluated in 12 healthy non-smoking, male volunteers. (Fluvoxamine label, Warnings and precautions)

  • IbuprofenNSAIDModerate

    Other factors that increase the risk of GI bleeding in patients treated with NSAIDs include longer duration of NSAID therapy; concomitant use of oral corticosteroids, aspirin, anticoagulants, or selective serotonin reuptake inhibitors (SSRIs); smoking; use of alcohol; older age; and poor general health status. (Ibuprofen label, Warnings and precautions)

  • IndomethacinNSAIDModerate

    Other factors that increase the risk of GI bleeding in patients treated with NSAIDs include longer duration of NSAID therapy; concomitant use of oral corticosteroids, aspirin, anticoagulants, or selective serotonin reuptake inhibitors (SSRIs); smoking; use of alcohol; older age; and poor general health status. (Indomethacin label, Warnings and precautions)

  • Insulin regular (human)insulinModerate

    In both cases, a prior history of heavy tobacco use was identified as a risk factor for lung cancer. (Insulin regular (human) label, Warnings and precautions)

  • KetorolacNSAIDModerate

    In addition to past history of ulcer disease, other factors that increase the risk for GI bleeding in patients treated with NSAIDs include concomitant use of oral corticosteroids, or anticoagulants, longer duration of NSAID therapy, smoking, use of alcohol, older age, and poor general health status. (Ketorolac label, Warnings and precautions)

  • MedroxyprogesteroneprogestinModerate

    MPA Injectable Suspension, USP can pose an additional risk in patients with risk factors for osteoporosis (e.g., metabolic bone disease, chronic alcohol and/or tobacco use, anorexia nervosa, strong family history of osteoporosis or chronic use of drugs that can reduce bone mass such as anticonvulsants or corticosteroids). (Medroxyprogesterone label, Warnings and precautions)

  • MeloxicamNSAIDModerate

    Other factors that increase the risk of GI bleeding in patients treated with NSAIDs include longer duration of NSAID therapy; concomitant use of oral corticosteroids, aspirin, anticoagulants, or selective serotonin reuptake inhibitors (SSRIs); smoking; use of alcohol; older age; and poor general health status. (Meloxicam label, Warnings and precautions)

  • NabumetoneNSAIDModerate

    Other factors that increase the risk for GI bleeding in patients treated with NSAIDs include concomitant use of oral corticosteroids or anticoagulants, longer duration of NSAID therapy, smoking, use of alcohol, older age, and poor general health status. (Nabumetone label, Warnings)

  • NaproxenNSAIDModerate

    Other factors that increase the risk of GI bleeding in patients treated with NSAIDs include longer duration of NSAID therapy; concomitant use of oral corticosteroids, aspirin, anticoagulants, or selective serotonin reuptake inhibitors (SSRIs); smoking; use of alcohol; older age; and poor general health status. (Naproxen label, Warnings and precautions)

  • NorethindroneprogestinModerate

    WARNINGS Cigarette smoking greatly increases the possibility of suffering heart attacks and strokes. (Norethindrone label, Warnings)

  • OlanzapineantipsychoticModerate

    This results in a mean increase in olanzapine Cmax following fluvoxamine of 54% in female nonsmokers and 77% in male smokers. (Olanzapine label, Drug interactions)

  • OmalizumabModerate

    The impact of longer exposure to omalizumab products or use in patients at higher risk for malignancy (e.g., elderly, current smokers) is not known. (Omalizumab label, Warnings and precautions)

  • Pentazocine and naloxoneopioidModerate

    Tobacco Smoking tobacco could enhance the metabolic clearance rate of pentazocine reducing the clinical effectiveness of a standard dose of pentazocine. (Pentazocine and naloxone label, Drug interactions)

  • ProgesteroneprogestinModerate

    Risk factors for arterial vascular disease (for example, hypertension, diabetes mellitus, tobacco use, hypercholesterolemia and obesity) and/or venous thromboembolism (for example, personal history or family history of venous thromboembolism [VTE], obesity and systemic lupus erythematosus) should be managed appropriately. a. (Progesterone label, Warnings)

  • PropafenoneantiarrhythmicModerate

    Drugs that inhibit these CYP pathways (such as desipramine, paroxetine, ritonavir, sertraline for CYP2D6; ketoconazole, erythromycin, saquinavir, and grapefruit juice for CYP3A4; and amiodarone and tobacco smoke for CYP1A2) can be expected to cause increased plasma levels of propafenone. (Propafenone label, Warnings and precautions)

  • Propranololbeta blockerModerate

    CYP1A2 and CYP2C19 Inducers: CYP1A2 inducers (e.g., phenytoin, montelukast, smoking) and CYP2C19 inducers (e.g. rifampin) decrease the plasma levels of propranolol resulting in a loss of efficacy [see Clinical Pharmacology ( 12.7 )] . (Propranolol label, Drug interactions)

  • Raloxifeneselective estrogen receptor modulatorModerate

    The risk-benefit balance should be considered in women at risk for stroke, such as prior stroke or transient ischemic attack (TIA), atrial fibrillation, hypertension, or cigarette smoking [see Clinical Studies ( 14.5 )] . (Raloxifene label, Warnings and precautions)

  • RiociguatvasodilatorModerate

    Pharmacokinetic Interactions with Adempas Smoking: Plasma concentrations in smokers are reduced by 50% to 60% compared to nonsmokers. (Riociguat label, Drug interactions)

  • RizatriptantriptanModerate

    Triptan-naïve patients who have multiple cardiovascular risk factors (e.g., increased age, diabetes, hypertension, smoking, obesity, strong family history of CAD) should have a cardiovascular evaluation prior to receiving rizatriptan benzoate. (Rizatriptan label, Warnings and precautions)

  • Ropiniroledopamine agonistModerate

    Cigarette smoking is expected to increase the clearance of ropinirole since CYP1A2 is known to be induced by smoking hormone replacement therapy [ see Clinical Pharmacology ( 12.3 ) ]. (Ropinirole label, Drug interactions)

  • SumatriptantriptanModerate

    Perform a cardiovascular evaluation in triptan-naive patients who have multiple cardiovascular risk factors (e.g., increased age, diabetes, hypertension, smoking, obesity, strong family history of CAD) prior to receiving IMITREX tablets. (Sumatriptan label, Warnings and precautions)

  • Sumatriptan and naproxentriptanModerate

    Perform a cardiovascular evaluation in patients who have multiple cardiovascular risk factors (e.g., increased age, diabetes, hypertension, smoking, obesity, strong family history of CAD) prior to receiving sumatriptan and naproxen sodium tablets. (Sumatriptan and naproxen label, Warnings and precautions)

  • TheophyllinemethylxanthineModerate

    Cessation of Smoking: Drug Interactions: Adding a drug that inhibits theophylline metabolism (e.g., cimetidine, erythromycin, tacrine) or stopping a concurrently administered drug that enhances theophylline metabolism (e.g., carbamazepine, rifampin). (Theophylline label, Warnings)

  • WarfarinanticoagulantModerate

    …contraceptives, phenylpropanolamine, propafenone, propranolol, terbinafine, thiabendazole, ticlopidine, verapamil, zileuton montelukast, moricizine, omeprazole, phenobarbital, phenytoin, cigarette smoking CYP3A4 alprazolam, amiodarone, amlodipine, amprenavir, aprepitant, atorvastatin, atazanavir, bicalutamide, cilostazol, cimetidine, ciprofloxacin, clarithromycin, conivaptan,… (Warfarin label, Drug interactions)

  • ZolmitriptantriptanModerate

    Perform a cardiovascular evaluation in triptan-naïve patients who have multiple cardiovascular risk factors (e.g., increased age, diabetes, hypertension, smoking, obesity, strong family history of CAD) prior to receiving zolmitriptan. (Zolmitriptan label, Warnings and precautions)

Minor mentions (6)

  • Dextromethorphanserotonergic drugMinor

    Ask a doctor before use if you have chronic cough that lasts such as occurs with smoking, asthma, or emphysema cough that occurs with too much phlegm (mucus) Stop use and ask a doctor if cough lasts more than 7 days, comes back, or occurs with fever, rash, or headache that lasts. (Dextromethorphan label, Warnings)

  • Dihydroergotamineergot alkaloidMinor

    Nicotine Nicotine may provoke vasoconstriction in some patients, predisposing to a greater ischemic response to ergot therapy. (Dihydroergotamine label, Drug interactions)

  • HeparinanticoagulantMinor

    Other Interactions Digitalis, tetracyclines, nicotine, or antihistamines, or intravenous nitroglycerin may partially counteract the anticoagulant action of heparin sodium. (Heparin label, Drug interactions)

  • InfliximabimmunosuppressantMinor

    All patients had a history of heavy smoking [see Adverse Reactions (6.1) ] . (Infliximab label, Warnings and precautions)

  • Naltrexone and bupropionopioid antagonistMinor

    Some patients who stopped smoking may have been experiencing symptoms of nicotine withdrawal, including depressed mood. (Naltrexone and bupropion label, Warnings and precautions)

  • Tranexamic acidantifibrinolyticMinor

    This is of particular concern in women who are obese or smoke cigarettes, especially smokers over 35 years of age. (Tranexamic acid label, Warnings and precautions)

Check Tobacco and smoking against everything you take. Add your full list; every pair is checked at once.

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Not medical advice. Severity reflects the label's wording, not your circumstances. A "major" flag can be routine under supervision and a "minor" one can matter at high doses. Ask a pharmacist.