If you’re looking into bittersweet nightshade health benefits, here’s the straight answer before anything else: this plant has a long folk-medicine history, but modern human evidence that it treats anything is thin to nonexistent — and it’s genuinely poisonous.
Every part of it contains toxic compounds, and its glossy red berries are attractive enough that they’re a real hazard to children and pets. So the useful version of this article isn’t a list of miracle cures. It’s an honest look at what people have used it for, what science can and can’t back up, and how to stay safe around it.
Bittersweet nightshade (Solanum dulcamara) is also called woody nightshade or climbing nightshade. It’s a scrambling vine in the same plant family as tomatoes, potatoes, and eggplant — and also as deadly belladonna, which is the more telling relative here Encyclopaedia Britannica, Solanaceae. The Latin name dulcamara points to the berries’ odd taste, sweet at first and then bitter.
What is bittersweet nightshade?
It’s a perennial vine or sprawling woody shrub, usually growing a few feet up through hedges, fences, and streamside brush across Europe, Asia, North America, and Canada. It’s considered an invasive weed in parts of the US NC State Extension Plant Toolbox, accessed 2026.
How to recognize it
Look for small star-shaped purple flowers with a pointed cone of bright yellow stamens in the center, blooming through summer. The berries start green, then ripen to shiny red in clusters. The crushed leaves and stems give off an unpleasant smell NC State Extension Plant Toolbox, accessed 2026. If you’re trying to identify a plant a child may have eaten, take a clipping (leaves, flowers, berries) with you when you call for help rather than relying on memory.
Other names you might see
Woody nightshade, climbing nightshade, bitter nightshade, blue nightshade, scarlet berry, felonwort, fever twig, violet bloom, and — in homeopathy — Dulcamara. It is sometimes loosely called “deadly nightshade,” but that name properly belongs to a different, even more toxic plant (Atropa belladonna).
Bittersweet nightshade health benefits: what the evidence actually shows
Traditional use on the skin (the strongest claim)
The best-documented use is external, on the skin. Herbal tradition has long applied preparations of the dried stem to inflamed, weepy skin conditions. The one place this rises above pure folklore is Germany: the German Commission E, an expert body that reviewed herbal medicines, approved the stem for external use as supportive care in chronic eczema Drugs.com, 2025.
That’s worth understanding precisely. A Commission E approval reflects traditional use and a judgment that a preparation is reasonable as supportive therapy — it is not the same as proof from modern controlled clinical trials, of which there are essentially none for this plant. So the honest grade here is traditional use with limited regulatory backing, not clinically proven.
Older internal uses that have been abandoned
Historically, people took bittersweet nightshade internally for bronchitis, rheumatism, jaundice, and skin disease, and it appeared in the British Pharmacopoeia until 1907 NC State Extension Plant Toolbox, accessed 2026. The name felonwort comes from using it on “felons,” painful infections around the nail. Investigators looked into whether it had real antirheumatic, diuretic, or sedative activity, but those effects turned out to be tied to the plant’s toxicity, so they were never developed into an accepted medicine Drugs.com, 2025. In other words, the internal uses were largely dropped for good reason.
Laboratory and animal research
The plant contains a group of compounds called spirosolane glycoalkaloids, and chemists have isolated several of them over the years — one 1960s study even pulled out a compound with tumor-inhibiting activity in the lab Drugs.com, 2025. More recently, a few studies fed extracts to diabetic rodents to look at blood sugar, but the results were mixed and one study reported high animal death rates, which tells you how narrow the line is between a dose that does something and a dose that harms Drugs.com, 2025. None of this is human evidence, and none of it supports taking the plant.
The bottom line on benefits
| Use | What kind of evidence | How strong |
| External use for chronic eczema / skin inflammation | Traditional use; German Commission E monograph | Limited — traditional, not trial-proven |
| Internal use (bronchitis, rheumatism, jaundice) | Historical / folk; largely abandoned | Insufficient — dropped due to toxicity |
| Anti-diabetic, anti-tumor effects | Lab and animal studies only | Early-stage — not applicable to people |
| Homeopathic Dulcamara | Traditional homeopathic use | Not supported by robust clinical evidence |
Read together, the picture is simple: a plant with a real history of topical folk use, a sliver of regulatory acknowledgment for the skin, and no dependable human evidence that it treats disease.
Why bittersweet nightshade is considered poisonous
Every part of the plant — leaves, stems, roots, flowers, and especially the berries — contains toxic alkaloids related to solanine, the same family of compounds that makes green potatoes mildly toxic NC State Extension Plant Toolbox, accessed 2026. Unripe green berries carry more of these glycoalkaloids than fully ripe ones, but ripe berries are not safe either Drugs.com, 2025.
The US Food and Drug Administration classifies bittersweet as an unsafe, poisonous herb because of these compounds Drugs.com, 2025. One figure repeated in the literature estimates that on the order of 200 berries could be a lethal dose for an adult Drugs.com, 2025 — but treat that as a rough estimate, not a safety threshold. Far less can cause serious illness, and children are more vulnerable than adults. Two features make poisoning easy to miss: symptoms can be delayed for several hours, and they closely resemble a stomach bug, so they’re often mistaken for ordinary gastroenteritis Drugs.com, 2025.
Foxglove is the classic example of a plant that can heal or harm depending entirely on the dose; bittersweet nightshade sits on the far riskier end of that spectrum, where the “heal” side never really panned out. If that tension interests you, our piece on the foxglove plant, a heart remedy that is also toxic, tells that story in more detail.
Side effects, poisoning symptoms, and skin reactions
If someone swallows part of the plant, reported effects include nausea, vomiting, diarrhea, stomach pain, drowsiness, dilated pupils, a slowed heart rate, and low blood pressure. In more serious poisonings, the picture can progress to confusion, weakness, slowed breathing, convulsions, and shock Drugs.com, 2025, NC State Extension Plant Toolbox, accessed 2026.
Handling the plant has its own smaller risk: contact with the leaves and stems can irritate the skin, so gloves are recommended for anyone pulling it out of a garden NC State Extension Plant Toolbox, accessed 2026. That’s a useful reminder that “used on the skin traditionally” and “harmless to touch” are not the same thing.
Who should avoid bittersweet nightshade completely
Some cautions apply to everyone, and some to specific groups.
- Pregnant and breastfeeding women. Avoid it. The plant’s glycoalkaloids caused birth defects in animal studies, and it’s specifically contraindicated in pregnancy and lactation (Drugs.com, 2025).
- Children. Keep them away from it entirely. The bright berries are tempting, and children are the group most likely to be seriously harmed (Drugs.com, 2025).
- Pets and livestock. The whole plant is toxic to dogs, cats, horses, and grazing animals (NC State Extension Plant Toolbox, accessed 2026).
- Anyone considering swallowing it. There’s no established safe dose, and the compounds have a documented, if weak, effect on the heart and circulation (Drugs.com, 2025).
Does it interact with medications?
Honestly, this hasn’t been studied enough to give a clean list. Formal drug interactions are described as not well documented Drugs.com, 2025. That absence is a gap in the research, not a reassurance of safety — because the plant can affect the gut, the nervous system, and to a small degree the heart, combining it with medications is a real unknown. If you take any prescription drug, that uncertainty is one more reason not to use this plant without talking to a professional first.
What to do if someone swallows bittersweet nightshade
Treat any ingestion — especially of the berries, and especially by a child — as a possible emergency, and don’t wait for symptoms, since they can be delayed.
In the United States, call Poison Help at 1-800-222-1222. It’s free, confidential, staffed by experts, and available 24/7; call your local emergency number (911) instead if the person is collapsing, seizing, struggling to breathe, or unresponsive. Do not try to make the person vomit unless poison control or a clinician tells you to NIH MedlinePlus, 2023. When you call, have the person’s age and weight, the plant part and rough amount swallowed, and the time it happened ready if you can.
Seek urgent, in-person care if you see: repeated vomiting or diarrhea, a fast or very slow heartbeat, drowsiness or confusion, dilated pupils, trouble breathing, seizures, or fainting. Outside the US, contact your national poison center or emergency number.
If you’re still thinking about using it
Given everything above, the practical advice is short. Don’t harvest wild bittersweet nightshade and don’t make your own preparations from it — dosing is unpredictable, the toxic and “active” amounts sit close together, and even handling it can irritate your skin. If you’re drawn to it for a skin issue like eczema, there are far safer, better-studied options; our roundups of herbs commonly used for skin problems and gentler plant remedies for eczema are more useful starting points. And whatever you’re considering, run it past a doctor or pharmacist first — particularly if you’re pregnant, breastfeeding, taking medication, or thinking about anything for a child.
| Health disclaimer: This article is for general education and information only. It is not medical advice and is not a substitute for diagnosis or treatment from a qualified healthcare professional. Bittersweet nightshade is a toxic plant; nothing here should be read as encouragement to grow, harvest, prepare, or consume it. If you are pregnant, breastfeeding, managing a health condition, or taking any medication, talk to your doctor or pharmacist before using any herbal or natural product. If you suspect poisoning, contact Poison Help (1-800-222-1222 in the US) or your local emergency services right away. |
Frequently Asked Questions
Is bittersweet nightshade poisonous to humans?
Yes. All parts contain solanine-type alkaloids, and the FDA classifies it as an unsafe, poisonous herb. The berries are the most common cause of accidental poisoning, especially in children. (Drugs.com, 2025)
Are the red berries deadly?
They’re toxic, though serious poisonings are more common in children than adults. Because symptoms can be delayed and look like a stomach bug, any ingestion is worth a call to poison control rather than a wait-and-see approach. (Drugs.com, 2025)
Does bittersweet nightshade actually help eczema?
There’s a long tradition of external use, and Germany’s Commission E approved the stem as supportive care for chronic eczema — but there’s no strong clinical trial evidence, and safer, better-studied skin remedies exist. (Drugs.com, 2025)
Is the homeopathic remedy “Dulcamara” the same plant?
Yes, Dulcamara is the homeopathic name for Solanum dulcamara. Homeopathic use isn’t supported by robust clinical evidence, and highly diluted homeopathic products are a separate question from the raw plant, which is toxic.
My dog ate some — what should I do?
The whole plant is toxic to pets. Call your veterinarian or a pet poison line promptly, and bring a sample of the plant if you can. (NC State Extension Plant Toolbox, accessed 2026)
How is it different from deadly nightshade?
“Deadly nightshade” usually means Atropa belladonna, a related but distinct and even more dangerous plant. Bittersweet nightshade (Solanum dulcamara) is toxic but less so; both belong to the nightshade family. (Encyclopaedia Britannica, Solanaceae)
References
- Bittersweet Nightshade. Drugs.com Natural Products (professional monograph), Wolters Kluwer, medically reviewed, updated Aug 6, 2025. View source
- Solanum dulcamara (Bittersweet Nightshade). North Carolina Extension Gardener Plant Toolbox, NC State Extension (accessed July 2026). View source
- Nightshade poisoning. MedlinePlus Medical Encyclopedia, U.S. National Library of Medicine / NIH, reviewed Nov 2, 2023. Cited only for genus-level solanine toxicity and first aid. View source
- Solanaceae. Encyclopaedia Britannica (accessed July 2026). View source
