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Ginkgo, Green Tea Extract and Your Medicines: What to Check First
Ginkgo may raise the chance of bleeding if you take a blood thinner such as warfarin. Green tea extract is a rare but well-established cause of liver injury, may lower atorvastatin levels, and its caffeine in high doses may weaken nadolol. Nerve Savior contains both, with no amounts printed, so show the label to your doctor or pharmacist first.
Written by the Nerve Savior editorial teamUpdated · 8 min read
The question
Why do ginkgo and green tea extract matter if you take medicines?
Both are plant ingredients with documented medicine cautions, and both sit inside Nerve Savior's 600 mg blend. Neither has a printed amount.
The blend order gives a ceiling. Ginkgo is eighth of 11 ingredients, so it can weigh at most 75 mg per serving. Green tea extract is last, at most about 55 mg. That is our math from the label, not a lab result, and the real amounts are probably lower (FDA, Dietary Supplement Labeling Guide).
Small does not mean safe to ignore. The back label itself says anyone with a known medical condition should consult a physician first.
The label prints "Gingko Biloba Powder." It is the same plant, Ginkgo biloba, spelled the usual way everywhere else.
Ginkgo
Can ginkgo interact with blood thinners?
Yes, it may. The National Center for Complementary and Integrative Health (NCCIH) says ginkgo may raise the chance of bleeding in people taking anticoagulants such as warfarin (NCCIH, Ginkgo). If you take any blood thinner, talk to your doctor before starting a product that contains it.
NCCIH lists dizziness, stomach upset and headache as common side effects. A six-year study of more than 3,000 older adults found no drop in dementia with ginkgo, and NCCIH's page does not mention neuropathy at all (NCCIH, Ginkgo). More detail is on the ginkgo ingredient page.
Green tea extract
Which medicines can green tea extract affect?
NCCIH names two. Green tea's caffeine, in high doses, may reduce how well nadolol (a beta blocker) works, and green tea extracts may lower blood levels of atorvastatin, a cholesterol medicine (NCCIH, Green Tea).
Lower drug levels can mean a medicine quietly does less than your doctor expects.
Green tea extract also contains caffeine (NCCIH, Green Tea), in an amount the label does not give. Mention it if you are sensitive to caffeine.
At a glance
Which Nerve Savior ingredients have known medicine cautions?
Ginkgo and green tea extract are the main ones, but two others are worth a line.
| Ingredient (most per serving) | Medicine or condition | What the source says |
|---|---|---|
| Ginkgo (75 mg) | Blood thinners such as warfarin | May raise the chance of bleeding (NCCIH, Ginkgo) |
| Green tea extract (about 55 mg) | Atorvastatin | Extracts may lower its blood levels (NCCIH, Green Tea) |
| Green tea extract | Nadolol | High doses of green tea may reduce its effect (NCCIH, Green Tea) |
| Green tea extract | Liver health | Well-established, rare cause of liver injury (NIH LiverTox, Green Tea) |
| Cinnamon (species not named) | Liver disease | Cassia cinnamon contains coumarin; prolonged use could be an issue (NCCIH, Cinnamon) |
| Vitamin B12 (about 667 mcg) | Metformin, acid reducers | These medicines can lower B12 levels (NIH ODS, Vitamin B12) |
| Vitamin B6 (about 86 mg) | Other B6 products | Too much over time can cause nerve damage (NIH ODS, Vitamin B6) |
The B12 row runs the other way: the medicine affects the vitamin. Read metformin and vitamin B12 for why a test beats guessing. For B6, add up every product you take; see B6 and nerves.
Liver
How likely is liver injury from green tea extract?
Rare, but well documented. The pattern matters more than the dose.
A known cause
NIH's LiverTox rates green tea extract as a well-established cause of liver injury, with more than 100 published cases (NIH LiverTox, Green Tea).
Timing
Injury usually appears one to six months after starting. Most people recover, but rare fatal cases are described (NIH LiverTox, Green Tea).
Dose does not predict it
LiverTox found no clear dose dependency, so a small amount is not a guarantee of safety (NIH LiverTox, Green Tea).
A gene variant
About 5 to 15 percent of Americans carry an immune-related gene variant that may make them more susceptible (NCCIH, Green Tea).
Stop the product and see a doctor for dark urine, yellow skin or eyes, or belly pain.
Green tea as a drink is different: NCCIH reports no safety concerns for the beverage (NCCIH, Green Tea).
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Should you ask a doctor before taking Nerve Savior with your medicines?
Five questions. Question 3 is the one about medicines. Your answers stay on your screen.
Take the bottle or a photo of the label to the visit. Every label caution is on the side effects page.
Three steps
How do you check a supplement against your medicines?
Make one list
Write down every prescription, over-the-counter medicine and supplement, with doses.
Show the label
Point out ginkgo, green tea extract and the missing amounts. Your pharmacist can check them against your medicines.
Agree on what to watch
Ask which signs mean stop, such as unusual bruising, bleeding or the liver signs above.
Perspective
Does the small amount in Nerve Savior make interactions unlikely?
Nobody can say, because the amounts are not printed. The ceilings are low, but a ceiling is not a dose.
For green tea extract, LiverTox says injury cannot be predicted from dose (NIH LiverTox, Green Tea). For ginkgo, NCCIH's bleeding caution does not name a safe amount (NCCIH, Ginkgo). So the practical answer is the same whatever the true numbers: if you take a blood thinner, a statin, nadolol or have liver disease, ask first.
In fairness, the label lists every ingredient in weight order, which is what lets you spot these two at all. See the green tea extract page.
FAQ
Ginkgo and green tea interaction questions
Can you take ginkgo biloba with warfarin?
Talk to your doctor first. NCCIH says ginkgo may raise the chance of bleeding in people taking anticoagulants such as warfarin. That includes products like Nerve Savior, where ginkgo is one of 11 ingredients and no amount is printed. Your doctor may advise avoiding it or watching closely.
Does green tea extract interact with statins?
It may with atorvastatin. NCCIH says green tea extracts may lower blood levels of atorvastatin, which could make it work less well. If you take a statin, ask your pharmacist before starting any product with green tea extract, including Nerve Savior, which lists it last in its blend.
Can green tea extract damage your liver?
Rarely, yes. NIH's LiverTox rates green tea extract as a well-established cause of liver injury, usually one to six months after starting, with no clear link to dose. Most people recover. Stop and see a doctor for dark urine, yellow skin or eyes, or belly pain.
Is drinking green tea the same as taking green tea extract?
No. NCCIH reports no safety concerns for green tea as a beverage. The liver injury reports involve concentrated extracts, mainly in capsules and pills. Nerve Savior contains green tea extract labeled 50%, not brewed tea, so the extract cautions are the ones that apply.
Can I take Nerve Savior with blood pressure medicine?
Ask your doctor or pharmacist first. Its green tea extract contains caffeine, and NCCIH says high doses of green tea may reduce the effect of nadolol. The label also asks anyone with a known medical condition to consult a physician before use. Bring the label to that conversation.
What are the side effects of ginkgo biloba?
NCCIH lists dizziness, stomach or intestinal upset and headache as common side effects, plus a possible higher bleeding risk with blood thinners. It reports no benefit for dementia prevention in a six-year study, and its ginkgo page does not mention neuropathy.
How much ginkgo and green tea extract is in Nerve Savior?
The label does not say. Both sit in a 600 mg blend listed heaviest first, so ginkgo, eighth, can weigh at most 75 mg, and green tea extract, eleventh, at most about 55 mg. Those are ceilings from label order, not measured amounts.
Who wrote this
Written and reviewed by
Plain-language pages built from the label, the sales listing and linked public health sources.
Last updated . Read our editorial standards and how we check reviews. This website is run by Thenervesavior, a U.S. stocking partner, not by the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
Keep reading
More about Nerve Savior
Side effects
Every known caution for Nerve Savior's 11 ingredients, the medicines to ask about, and the signs that mean stop.
Read moreGinkgo biloba
Ginkgo is eighth in the blend: the blood flow ingredient, what a 6-year trial found, and the blood thinner caution.
Read moreGreen tea extract
The last and smallest ingredient: what the 50% may mean, the liver signal, caffeine and two drug interactions.
Read moreU.S. stocking partner for Nerve Savior
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