Adenosine

• Adenocard

Green tea contains caffeine. The caffeine in green tea might block the effects of adenosine, which is often used by doctors to do a test called a cardiac stress test. Stop consuming green tea at least 24 hours before a cardiac stress test.

Antibiotics

• Doxycycline

• Ciprofloxacin

• Amoxicillin

• Azithromycin

• Norfloxacin

• Trimethoprim

The body breaks down caffeine to get rid of it. Some antibiotics might decrease how quickly the body breaks down caffeine. Taking these antibiotics along with green tea can increase the risk of side effects including jitteriness, headache, increased heart rate, and other side effects.

Birth control pills

Green tea contains caffeine. The body breaks down caffeine to get rid of it. Birth control pills can decrease how quickly the body breaks down caffeine. This might increase the risk for side effects from caffeine, such as jitteriness, headache, and fast heartbeat.

Bortezomib

• Velcade

Bortezomib is used in certain types of cancers. Green tea might interact with bortezomib and decrease its effects. If you take bortezomib, avoid taking green tea products.

Carbamazepine

Caffeine can decrease the effects of carbamazepine. Since green tea contains caffeine, taking green tea with carbamazepine might decrease the effects of carbamazepine.

Celiprolol

• Celicard

Green tea appears to decrease how much celiprolol is absorbed into the body. This might decrease the effects of celiprolol.

Cimetidine

• Tagamet

Green tea contains caffeine. The body breaks down caffeine to get rid of it. Cimetidine can decrease how quickly the body breaks down caffeine. Taking cimetidine along with green tea might increase the chance of caffeine side effects including jitteriness, headache, fast heartbeat, and others.

Clozapine

• Clozaril

The body breaks down clozapine to get rid of it. The caffeine in green tea seems to decrease how quickly the body breaks down clozapine. Taking green tea along with clozapine can increase the effects and side effects of clozapine.

Dipyridamole

• Persantine

Green tea contains caffeine. The caffeine in green tea might block the effects of dipyridamole. Dipyridamole is often used by doctors to do a test on the heart called a cardiac stress test. Stop drinking green tea at least 24 hours before a cardiac stress test.

Disulfiram

• Antabuse

The body breaks down caffeine to get rid of it. Disulfiram can decrease how quickly the body gets rid of caffeine. Taking green tea along with disulfiram might increase the effects and side effects of caffeine, including jitteriness, hyperactivity, irritability, and others.

Estrogens

• Oral contraceptive pill

• Estradiol

• Conjugated estrogens

• HRT combination products

The body breaks down the caffeine in green tea to get rid of it. Estrogens can decrease how quickly the body breaks down caffeine. Taking estrogen and drinking green tea can increase the risk of caffeine side effects, including jitteriness, headache, fast heartbeat, and others.

Ethosuximide

• Zarontin

Ethosuximide is a drug used to treat seizures. Caffeine in green tea can decrease the effects of ethosuximide. Taking green tea with ethosuximide might decrease the effects of ethosuximide. This might increase the risk of seizures.

Felbamate

• Felbatol

Felbamate is a drug used to treat seizures. The caffeine in green tea might decrease the effects of felbamate and increase the risk of seizures in some people.

Fexofenadine

• Allegra

Green tea might decrease how much fexofenadine the body absorbs. Separate taking this medication from consuming green tea.

Flutamide

• Eulexin

The body breaks down flutamide to get rid of it. The caffeine in green tea might decrease how quickly the body gets rid of flutamide. This could increase the effects and side effects of flutamide.

Fluvoxamine

• Luvox

The body breaks down the caffeine in green tea to get rid of it. Fluvoxamine can decrease how quickly the body breaks down caffeine. Taking fluvoxamine along with green tea might increase the risk of caffeine side effects such as jitteriness, headache, fast heartbeat, and others.

Imatinib

• Gleevec

Imatinib is used to treat certain types of cancer. Green tea appears to reduce how much imatinib gets into the body. This might decrease the effects of imatinib.

Lisinopril

Green tea appears to decrease how much lisinopril is absorbed into the body. This might decrease the effects of lisinopril.

The caffeine in green tea can increase how quickly the body gets rid of lithium. If you take products that contain caffeine and you take lithium, don't stop taking caffeine all at once. Decrease the daily dose of caffeine slowly. Stopping caffeine too quickly can increase the side effects of lithium.

Medications for asthma

• Beta-adrenergic agonists

Green tea contains caffeine. Caffeine can stimulate the heart. Some medications for asthma can also stimulate the heart. Taking caffeine with some medications for asthma might cause too much stimulation and cause heart problems.

Medications for depression

• MAOIs

Green tea contains caffeine. There is some concern that caffeine can interact with certain medications, called MAOIs. If caffeine is taken with these medications, it might increase the risk for serious side effects including fast heartbeat and very high blood pressure. Some common MAOIs include phenelzine, selegiline, and tranylcypromine.

Medications moved by pumps in cells

• Rosuvastatin

• Atorvastatin

• Simvastatin

• Methotrexate

• Fexofenadine

• Levothyroxine

Some medications are moved in and out of cells by pumps. Green tea might change how these pumps work and change how much medication stays in the body. In some cases, this might change the effects and side effects of a medication.

• Dabigatran

• Cyclosporine

• Fexofenadine

• Loperamide

• Some HIV antiretrovirals

Medications that can harm the liver

• Acetaminophen / Paracetamol

• Methotrexate

• Atorvastatin

• Simvastatin

• Isoniazid

Green tea extracts might harm the liver. Some medications can also harm the liver. Taking green tea extracts along with a medication that can harm the liver might increase the risk of liver damage.

Medications that slow blood clotting

• Heparin

• Rivaroxaban

• Apixaban

• Dabigatran

• Clopidogrel

Green tea might slow blood clotting. Taking green tea along with medications that also slow blood clotting might increase the risk of bruising and bleeding.

Nicotine

Stimulant drugs such as nicotine speed up the nervous system. The caffeine in green tea might also speed up the nervous system. Taking green tea along with stimulant drugs might cause serious problems, including increased heart rate and high blood pressure. Avoid taking stimulant drugs along with caffeine.

Nintedanib

• Ofev

Green tea might decrease how much nintedanib is in the body. It's not clear if this is a real concern.

Pentobarbital

• Nembutal

The stimulant effects of the caffeine in green tea can block the sleep-producing effects of pentobarbital.

Phenobarbital

• Luminal

Phenobarbital is a drug used to treat seizures. The caffeine in green tea might decrease the effects of phenobarbital and increase the risk of seizures in some people.

Phenylpropanolamine

Green tea contains caffeine. Caffeine can stimulate the body. Phenylpropanolamine can also stimulate the body. Taking green tea and phenylpropanolamine together might cause too much stimulation and increase heartbeat and blood pressure and cause nervousness.

Phenytoin

Phenytoin is a drug used to treat seizures. The caffeine in green tea can decrease the effects of phenytoin. Taking green tea with phenytoin might decrease the effects of phenytoin and increase the risk of seizures in some people.

Pioglitazone

• Actos

Green tea contains caffeine. Caffeine might increase the amount of pioglitazone that the body absorbs. Taking green tea might increase the effects and adverse effects of pioglitazone.

Riluzole

• Rilutek

Drinking green tea can decrease how quickly the body breaks down riluzole and increase the effects and side effects of riluzole.

Rosuvastatin

Taking green tea extract might change the amount of rosuvastatin in the blood. This might change the effects and side effects of rosuvastatin.

Stimulant drugs

Stimulants, such as amphetamines and cocaine, speed up the nervous system. By speeding up the nervous system, stimulant medications can increase blood pressure and speed up the heartbeat. Green tea contains caffeine. Caffeine can also speed up the nervous system. Taking green tea along with stimulant drugs might cause serious problems including increased heart rate and high blood pressure.

Theophylline

Green tea contains caffeine. Caffeine works similarly to theophylline. Caffeine can also decrease how quickly the body gets rid of theophylline. Taking green tea along with theophylline might increase the effects and side effects of theophylline.

The caffeine in green tea might decrease the effects of valproate.

Verapamil

• Calan, others

Verapamil can decrease how quickly the body gets rid of caffeine. Drinking green tea and taking verapamil can increase the risk of caffeine side effects including jitteriness, headache, and an increased heartbeat.

• Jantoven

• Used for: blood thinning, clot prevention

Green tea contains vitamin K. Vitamin K can reduce the effect of warfarin. But the amount of vitamin K in green tea is very small. So green tea is unlikely to interact with warfarin when used in moderation. Large amounts of green tea, such as 8 cups or more each day, should be avoided.

Diuretics

• Diuretic drugs

Green tea contains caffeine. Caffeine, especially in large amounts, can reduce potassium levels in the body. "Diuretics" can also decrease potassium in the body. Taking large amounts of caffeine along with "Diuretics" might decrease potassium in the body too much.

Medications that decrease the immune system

• Cyclosporine

• Tacrolimus

• Mycophenolate

• Prednisone

• Methotrexate

• Azathioprine

Selenium can increase the activity of the immune system. Some medications, such as those used after a transplant, decrease the activity of the immune system. Taking selenium along with these medications might decrease the effects of these medications.

Selenium might slow blood clotting. Taking selenium along with medications that also slow blood clotting might increase the risk of bruising and bleeding.

Niacin

Taking niacin along with the drug simvastatin can increase good cholesterol levels. Taking niacin plus simvastatin along with selenium and other antioxidants can decrease the effects of niacin and simvastatin on good cholesterol levels. It is unknown if selenium alone decreases the effects of niacin plus simvastatin on good cholesterol levels.

Sedative medications

• Diazepam

• Alprazolam

• Temazepam

• Zolpidem

• Zopiclone

• Promethazine

Selenium might reduce how quickly the body breaks down sedative medications. Taking selenium with these medications might increase the effects and side effects of these medications.

Selenium might slow blood clotting. Selenium might also increase the effects of warfarin in the body. Taking selenium along with warfarin might increase the chances of bruising and bleeding.

Panax ginseng might have some of the same effects as estrogen. Taking Panax ginseng along with estrogen pills might decrease the effects of estrogen.

Furosemide

Panax ginseng might decrease how well furosemide works. But there isn't enough information to know if this is a big concern.

Panax ginseng might decrease how quickly the liver breaks down imatinib. Taking Panax ginseng with imatinib might increase the effects and side effects of imatinib.

Insulin

Panax ginseng might decrease blood sugar. Insulin is also used to decrease blood sugar. Taking Panax ginseng along with insulin might cause your blood sugar to be too low. Monitor your blood sugar closely. The dose of your insulin might need to be changed.

Medications changed by the liver

• Tramadol

• Metoprolol

• Fluoxetine

• Paroxetine

• Tamoxifen

• Amitriptyline

Some medications are changed and broken down by the liver. Panax ginseng might change how quickly the liver breaks down these medications. If you are taking medications metabolised by the liver, monitor for any changes in how your medication affects you.

• Atorvastatin

• Simvastatin

• Amlodipine

• Diltiazem

• Cyclosporine

• Tacrolimus

• Midazolam

• Alprazolam

• Rivaroxaban

• Some HIV antiretrovirals

Taking Panax ginseng with MAOIs might increase the risk for certain side effects, such as anxiousness, headache, restlessness, and insomnia. Some common MAOIs include phenelzine, selegiline, and tranylcypromine.

Medications for diabetes

• Glyburide

• Glipizide

• Insulin

• Sitagliptin

• Empagliflozin

• Semaglutide

• Dapagliflozin

Panax ginseng might lower blood sugar levels. Taking panax ginseng along with diabetes medications might cause blood sugar to drop too low. Monitor your blood sugar closely.

Medications that can cause an irregular heartbeat

• QT interval-prolonging drugs

Panax ginseng might affect electrical currents in the heart. This can increase the risk of having an irregular heartbeat. Some medications can have this same effect. Taking panax ginseng with these medications might increase the risk for a serious heart issue.

Panax ginseng can increase the activity of the immune system. Some medications, such as those used after a transplant, decrease the activity of the immune system. Taking panax ginseng along with these medications might decrease the effects of these medications.

Panax ginseng might slow blood clotting. Taking panax ginseng along with medications that also slow blood clotting might increase the risk of bruising and bleeding.

Midazolam

• Versed

Panax ginseng might increase how quickly the liver breaks down midazolam. Taking Panax ginseng with midazolam may decrease the effects of midazolam.

Nifedipine

• Procardia

Panax ginseng might affect how much nifedipine is available in the body. Taking Panax ginseng along with nifedipine might increase the effects and side effects of nifedipine.

Raltegravir

• Isentress

Raltegravir has been associated with liver toxicity in some people. Taking Panax ginseng with raltegravir might increase the risk of liver toxicity in some people taking raltegravir.

Selegiline

• Eldepryl

Panax ginseng might decrease or increase how much selegiline is absorbed by the body. This might change the effects and side effects of selegiline.

Stimulant drugs speed up the nervous system. By speeding up the nervous system, stimulant medications can make you feel jittery and speed up your heartbeat. Panax ginseng might also speed up the nervous system. Taking Panax ginseng along with stimulant drugs might cause serious problems including increased heart rate and high blood pressure. Avoid taking stimulant drugs along with Panax ginseng.

Warfarin is used to slow blood clotting. Panax ginseng might decrease the effects of warfarin. But it's not clear if this interaction is a big problem. Be sure to have your blood checked regularly. The dose of your warfarin might need to be changed.

Some medications are changed and broken down by the liver. Turmeric might change how quickly the liver breaks down these medications. If you are taking medications metabolised by the liver, monitor for any changes in how your medication affects you.

Medications for cancer

• Cyclophosphamide

• Chlorambucil

• Melphalan

• Busulfan

• Temozolomide

Turmeric is an antioxidant. There is some concern that antioxidants might decrease the effects of some medications used for cancer. If you are taking medications for cancer, check with your healthcare provider before taking turmeric.

• Doxorubicin

• Bleomycin

• Daunorubicin

• Mitomycin

• Epirubicin

Turmeric is an antioxidant. There is some concern that antioxidants might decrease the effects of medications used for cancer. If you are taking medications for cancer, check with your healthcare provider before taking turmeric.

Turmeric might lower blood sugar levels. Taking turmeric along with diabetes medications might cause blood sugar to drop too low. Monitor your blood sugar closely.

Some medications are moved in and out of cells by pumps. Turmeric might change how these pumps work and change how much medication stays in the body. In some cases, this might change the effects and side effects of a medication.

Turmeric might harm the liver. Some medications can also harm the liver. Taking turmeric along with a medication that can harm the liver might increase the risk of liver damage.

Turmeric might slow blood clotting. Taking turmeric along with medications that also slow blood clotting might increase the risk of bruising and bleeding.

Methotrexate

• Trexall

• Otrexup

• Rasuvo

• Used for: rheumatoid arthritis, psoriasis, certain cancers

Turmeric might harm the liver. Methotrexate can also harm the liver. Taking turmeric along with methotrexate might increase the risk of liver damage.

Sulfasalazine

• Azulfidine

• Used for: Crohn's disease, ulcerative colitis, rheumatoid arthritis

Turmeric might increase how much sulfasalazine the body absorbs. Taking turmeric while taking sulfasalazine might increase the effects and side effects of sulfasalazine.

Tacrolimus

• Astagraf

• Used for: organ transplant anti-rejection

Turmeric might increase the amount of tacrolimus in the body. This can increase the side effects of tacrolimus and even damage the kidneys.

Talinolol

• Cordanum

• Used for: angina, heart conditions

Turmeric might decrease how much talinolol the body absorbs. Taking turmeric while taking talinolol might decrease the effects of talinolol.

Tamoxifen

• Soltamox

• Used for: breast cancer treatment and prevention

Turmeric might decrease how much tamoxifen is in the body. Taking turmeric with tamoxifen might decrease the effects of tamoxifen.

Tramadol

• ConZip

• Used for: moderate to severe pain

Turmeric might decrease or increase how much tramadol is in the body. Taking turmeric with tramadol might increase or decrease the effects of tramadol.

Warfarin is used to slow blood clotting. Taking turmeric while taking warfarin might increase the effects of warfarin and increase the risk of bleeding and bruising.

Zinc might decrease how much antibiotic the body absorbs from the gut. Taking zinc along with quinolone antibiotics might decrease the effects of these antibiotics. To avoid this interaction, take antibiotics at least 2 hours before or 4-6 hours after zinc supplements.

Zinc can decrease the amount of tetracyclines the body absorbs. Taking zinc with tetracyclines might decrease the effects of tetracyclines. To avoid this interaction, take tetracyclines 2 hours before or 4-6 hours after taking zinc supplements.

Bictegravir/emtricitabine/tenofovir alafenamide

• Biktarvy

In theory, zinc might decrease how much bictegravir/emtricitabine/tenofovir alafenamide the body absorbs from the stomach. To avoid this interaction, take bictegravir/emtricitabine/tenofovir alafenamide at least 2 hours before or 6 hours after zinc containing products.

Cephalexin

• Keflex

Zinc can reduce how much cephalexin the body absorbs. This might decrease how well cephalexin works for treating infections. To avoid this interaction, take zinc 3 hours after taking cephalexin.

Cisplatin

• Platinol-AQ

Cisplatin is used to treat cancer. Taking zinc along with cisplatin might inactivate cisplatin therapy. But it's not clear if this is a big concern.

Medications for HIV/AIDS

• Integrase inhibitors

Taking zinc along with integrase inhibitors might decrease blood levels of integrase inhibitors. This might decrease the effects of these medications. Talk to your healthcare provider if you are using integrase inhibitors and want to start taking zinc.

Penicillamine

• Cuprimine, Depen

Zinc might decrease how much penicillamine the body absorbs. Taking zinc with penicillamine might decrease the effects of penicillamine. Take zinc and penicillamine at least 2 hours apart.

Ritonavir

• Norvir

Ritonavir is a drug used for HIV infection. Zinc can reduce how much ritonavir the body absorbs. But it isn't clear if this is a big concern.

Atorvastatin

Vitamin D might decrease how much atorvastatin the body absorbs. Taking vitamin D with atorvastatin might decrease the effects of atorvastatin.

Calcipotriene

• Dovonex

Taking vitamin D along with calcipotriene might increase the effects and side effects of calcipotriene.

• Used for: heart failure, atrial fibrillation

Taking vitamin D along with digoxin might increase the effects and side effects of digoxin. If you are taking digoxin, talk to your doctor before taking vitamin D supplements.

Diltiazem

• Cardizem, others

Vitamin D helps your body absorb calcium. Calcium can affect the heart. Diltiazem can also affect the heart. Taking large amounts of vitamin D along with diltiazem might decrease the effects of diltiazem.

Verapamil

• Calan, others

Vitamin D helps the body absorb calcium. Calcium can affect the heart. Verapamil can also affect the heart. Do not take large amounts of vitamin D if you are taking verapamil.

Diuretics

• Thiazide diuretics

Vitamin D helps the body absorb calcium. Some "Diuretics" increase the amount of calcium in the body. Taking large amounts of vitamin D along with some "Diuretics" might cause too much calcium in the body. This could cause serious side effects, including kidney problems.