Used centuries ago as a poison, hallucinogen, and even as a beauty remedy, belladonna is a plant rich in potentially deadly alkaloids. But the dose makes the poison: in low doses, this plant may help with IBS, menopausal complaints, migraines, and flu-like symptoms. Read on to learn more about its dark history and why safer alternatives are available.
“All things are poison and nothing is without poison; only the dose makes a thing not a poison.”
This 500-year-old principle of toxicology from the Swiss physician and chemist Paracelsus precisely describes the effects of belladonna (Atropa belladonna). It sheds light on why this unusual plant can be both a deadly poison and a healing remedy.
Belladonna, also known as deadly nightshade and devil’s cherries, is an herb belonging to the same family as tomatoes, potatoes, tobacco, and Jimsonweed (Solanaceae). It can be recognized by its purple, bell-shaped flowers and cherry-like, blackberries. Native to Europe, North Africa, and Western Asia, belladonna is also sometimes cultivated as an ornamental plant in the US [1 ,2 ].
Belladonna is very poisonous. It contains up to 20 different alkaloids. Its alkaloids are anticholinergics, substances that block the “rest-and-digest” action of acetylcholine in the body. One of the main active compounds is hyoscyamine, which is converted into a mixture called atropine in the body [1, 2].
Cholinergic activity in the body is generally beneficial, as opposed to fight-or-flight overdrive. However, blocking cholinergic activity is beneficial for some diseases, especially when it comes to respiratory disorders. Belladonna can be used to relax blocked airways, relieve headaches, irritable bowel syndrome, and menopausal symptoms [3, 4, 5, 6].
The therapeutic potential of belladonna was explored in the 19th and early 20th centuries. Belladonna and its alkaloids were used to improve conditions such as:
- Asthma [7, 8]
- Pneumonia [9, 10]
- Parkinson’s disease [11, 12]
- Huntington’s disease [13, 14]
- Motion sickness 
- Scarlet fever 
- Bowel obstruction [17, 18]
- Indigestion 
- Diabetes insipidus, a rare condition caused by problems with a chemical called vasopressin [20, 21]
- Joint and nerve pain [22, 23, 24]
- Weakness in the muscles and tissues of the groin (inguinal hernia) 
Belladonna is still available as a component of conventional medicines such as Bellergal (0.2 mg alkaloids) and Donnatal (0.13 mg alkaloids). However, these have largely been replaced by safer compounds with more specific effects. Belladonna is also sold as herbal preparations and homeopathic remedies .
- May help with menopausal complaints, flu-like symptoms, and migraines
- Toxic at very low doses
- Risk of serious adverse effects
- Interactions with anticholinergic drugs
- Insufficient evidence for several benefits
- Safer and more effective remedies are available for most uses
In the 16th century, Venetian women started using belladonna extract to enlarge their pupils and flush their cheeks, which was seen as attractive at the time. In fact, the plant received its common name from this use (“bella donna” means “beautiful woman” in Italian) [1, 2].
However, the poisonous properties of belladonna were well known since ancient times and even mentioned in historical literature such as Homer’s Iliad and Odyssey. In the medieval ages, belladonna was mainly used as a poison and to induce hallucinations in witchcraft and sorcery rituals .
Belladonna may be the reason witches are represented as flying on broomsticks. Peculiarly, they would rub a “flying ointment” with belladonna and other poisonous plants on their thighs with a broom. The alkaloids would be absorbed through the skin and caused vivid hallucinations and sensations of flight. Once they regained consciousness, the women were convinced that the flight was real.
Another legend says that centuries ago, spies hired by kings and the wealthy learned how to ingest small amounts of a brew made from belladonna to develop tolerance. This way, the assassin could show the drink is safe to consume, which would encourage the victim to swallow its deadly poison.
The main active compounds of Belladonna are its alkaloids, which the plant uses as a defense against the animals tempted to eat it. The roots contain approximately 0.7 % alkaloids, while the leaves contain slightly less (0.04%). The most abundant ones are [26, 27, 28]:
- Atropine (or apoatropine)
Some other less concentrated alkaloids in the roots and leaves include:
Ripe Belladonna fruits contain approximately 2 mg alkaloids per berry, with atropine accounting for up to 98% .
Consuming 2 – 5 berries or a single leaf can be fatal. Most cases of poisoning occur from eating the berries, either by mistaking them for blueberries or to cause deliberate self-harm. Unintentional poisoning from herbal extracts has also been reported .
Acetylcholine is the main neurotransmitter of the rest-and-digest (parasympathetic) system, which opposes the action of the fight-or-flight (sympathetic) system. In the brain, acetylcholine stimulates memory and cognitive processes. Outside the brain, it activates muscles and aids digestion [32, 33, 34].
Belladonna alkaloids block the action of acetylcholine by binding to its receptors in nerves, muscles, and glands. They can also cross the blood-brain barrier and achieve effects in the brain, where they prevent nausea and cause hallucinations, memory loss, and sleepiness. Outside the brain, they enlarge the pupils, increase heart rate (except at low doses), decrease bodily secretions, reduce bowel movements, and tighten blood vessels [1, 35].
The alkaloids in belladonna slightly differ in their effects. Atropine is especially active in the heart, intestines, and bronchi. Hyoscyamine has stronger effects on the nervous system, and scopolamine has a shorter action with the greatest effects on the brain, eyes, and glands .
This section refers to using belladonna extracts or its active compounds in low (but quantifiable) doses, unlike the post about homeopathic formulations. If you’re most interested in homeopathic belladonna remedies, check out this post.
Some of the studies on belladonna listed here date back to the 50s and 60s. Other more recent studies have also explored the potential benefits of low-dose belladonna in combination with other drugs. Its active alkaloid, atropine, is commonly used to dilate the pupils during eye procedures.
Although we present all the research to date, belladonna is very rarely used for these medical purposes today. Safer, more effective conventional and alternative therapies with sufficient evidence supporting their effectiveness exist. Discuss with your doctor if belladonna may help with your condition and never take it in place of what your doctor recommends or prescribes.
Organophosphates are highly poisonous pesticides that cause the buildup of acetylcholine in the body by blocking the enzyme that breaks it down (acetylcholinesterase). Belladonna’s alkaloid atropine is widely used to reduce the acetylcholine over-stimulation in such cases of poisoning. Anisodamine, a less powerful belladonna alkaloid, has been successfully tested as an alternative to atropine with fewer side effects [36, 37].
In rats and dogs with poisoning from the organophosphate pesticide parathion, belladonna alkaloids (atropine, hyoscyamine, and total alkaloid extract) reduced death rates .
A commercial extract of belladonna alkaloids (Bellafoline 0.5 mg) combined with the alkaloid ergotamine allowed rats to survive otherwise lethal injections of a scorpion toxin .
The following purported benefits are only supported by limited, low-quality clinical studies. There is insufficient evidence to support the use of belladonna for any of the below-listed uses. Remember to speak with a doctor before using any type of belladonna or its extracts, and never use them in place of something your doctor recommends or prescribes.
Irritable bowel syndrome (IBS) is a chronic inflammatory gut condition, with pain and altered bowel movements (diarrhea, constipation, or both). The combination of belladonna (8 mg) with an anticonvulsant (phenobarbital 30 mg) improved both the digestive and psychological (anxiety, tiredness, sleep difficulties) symptoms in 2 old clinical trials on 91 people [40, 3].
In two recent trials on almost 150 people with IBS, a medicine with 10 mg belladonna extract and an opium alkaloid (papaverine 50 mg) improved pain, cramps, and bowel movements, but two other commercial medicines were more effective [41, 42].
The belladonna alkaloid scopolamine (10 mg hyoscine butylbromide 4x/day) improved irritable bowel syndrome in an old trial on 12 people, especially in combination with the anti-anxiety drug (lorazepam) and the laxative ispaghula husk .
Symptoms of irritable bowel syndrome are more commonly managed with other medications in conventional medicine. Overall, IBS is a complex disease that often requires a more holistic approach (monitoring hormones, stress, inflammation, and other hidden imbalances in the body) .
Menopausal women often experience hot flashes, sweating, insomnia, irritability, and loss of libido. Although estrogens are the usual therapy, they may cause side effects such as headaches or water retention and are strongly discouraged in breast cancer survivors .
A medication containing 0.2 mg belladonna alkaloids (Bellergal) improved the symptoms in 2 clinical trials on over 100 menopausal women. In one of them, however, the effects were no longer distinguishable from those of placebo after 8 weeks [6, 46].
In an observational study on 31 postmenopausal breast cancer survivors, 8 used Bellergal for hot flashes .
Rectal suppositories of belladonna and opium may be used to ease discomfort after medical procedures. Belladonna’s atropine and scopolamine relax the muscles, while opium’s morphine reduces pain .
Belladonna and opium suppositories reduced pain, urinary urgency, and the need for pain-relief medication in 3 clinical trials on over 200 people undergoing urinary and prostate procedures (prostate removal, ureteral stent placement, ureteroscopy). However, they failed to reduce pain from vaginal surgery or bladder injections in 2 clinical trials on over 100 women [49, 50, 51, 52, 53].
Belladonna alkaloids reduce airway blockage by preventing the narrowing of the bronchi. Oral belladonna tinctures (supplying 0.01 mg/kg atropine 1 – 2x/day for 7 days) widened blocked airways and improved breathing in two studies on over 100 children [54, 5].
In an old clinical trial on 55 people with frequent headaches, a complex with belladonna (0.2 mg alkaloids), ergotamine, and phenobarbital 2x/day for 4 weeks reduced pain and the need for pain medication. In a case series from the 1950s, a similar combination (Bellergal) had “satisfactory results” at relieving headaches in 73% of people [4, 56+].
Such combinations are no longer used, due to their high risk of toxicity, abuse, and overdose. In fact, the sedative phenobarbital was the “sleeping pill” responsible for numerous suicides and deaths in the 50s. It was one of the drugs in the cocktail that killed Marilyn Monroe. Its past is even darker than Belladonna’s, as it was also allegedly used in Nazi euthanasia programs in the 40s.
Premenstrual syndrome (PMS) can include various symptoms that vary between one woman and another. These include mood swings, irritability, fatigue, sleepiness, acne, tender breasts, and water retention .
In an old clinical trial on 25 women, a medication with 0.2 mg belladonna alkaloids (Bellergal) 3x/day during the 10 days before their period improved the symptoms .
Almost all women experience PMS at some point in their life, and the good news is that there are various safe medications and natural solutions that can help relieve the symptoms.
Belladonna’s alkaloid atropine reduced drooling in 2 clinical trials on 7 adults and 19 children with disabilities. It also reduced the drooling caused by the sedative ketamine in a trial on 140 children, but not in an observational study on 164 [59, 60, 61, 62].
Pregnant women often experience increased salivation, which is linked to nausea. By blocking the rest-and-digest action of acetylcholine, belladonna reduces salivation. Belladonna alkaloids (4x/day for 5 days) combined with phenothiazine suppositories reduced the excessive drooling and resulting nausea in two pregnant women .
In an old clinical trial on 75 people with anxiety caused by digestive disorders, a medicine with 0.1 mg belladonna alkaloids (Bellergal) 4x/day for 4 weeks improved anxiety more effectively than the sedative chlordiazepoxide (Librium) .
However, both belladonna oral tincture (20 drops) and an atropine injection (0.4 mg) failed to reduce the anxiety caused by a contrast agent used for examining the urinary tract in an old clinical trial on over 1,100 people .
If you suffer from anxiety, we suggest you stay away from belladonna tinctures due to their lack of safety and effectiveness. Explore other safe, natural, and evidence-based behavioral strategies and supplements that may help instead.
At the doses prescribed by doctors to people without certain risk factors, belladonna is possibly safe and doesn’t cause serious adverse effects.
- Dry mouth
- Skin rash
In an observational study, children taking belladonna syrup for airway obstruction developed only minor side effects such as :
- Loss of appetite
- Sleep difficulties
In rare cases, over-the-counter belladonna medicines have caused other side effects, such as:
Although normally perceived as safer, herbal remedies can contain concentrated active compounds that are as likely as conventional medicines to cause adverse effects, especially at high doses.
One woman experienced severe poisoning after taking 50 mL of herbal belladonna tincture for insomnia with an unusually high atropine content (0.3 mg/mL). She experienced confusion, accelerated heart rate, and high blood pressure .
In a child with skin and eye yellowing (jaundice) caused by antibiotics for tuberculosis, a herbal remedy containing belladonna caused dry mouth, accelerated breathing, confusion, vomiting, loss of vision, and hallucinations .
The berries have a pleasantly sweet taste and accidental poisoning after eating them is not rare, especially in children. Poisoning due to recreational intake for its hallucinatory effects is most common in teenagers. Eating the plant or drinking tea brewed from it can cause severe poisoning due to its high alkaloid content. The main symptoms of belladonna poisoning include [69, 70, 71, 72, 73, 74, 75]:
- Meaningless speech
- Lack of coordination, tremors, and shakings
- Confusion and hallucinations
- Anxiety, agitation, and aggressiveness
- Increased heart rate
- Enlarged pupils and blurred vision
- Numbness, coma, and even death
Both atropine and scopolamine can cross the placenta and come into contact with the developing fetus. Several studies have investigated their potential to cause birth defects and death, but the results were contradictory. The FDA concluded that risks cannot be ruled out when belladonna is used during pregnancy (category C) [76, 77, 78, 79].
Belladonna alkaloids can also accumulate in breast milk and expose babies to their potential toxicity, although this is insufficiently investigated. Belladonna may also reduce milk production and has been traditionally applied on the nipples for this purpose [2, 80].
Children are more sensitive to belladonna poisoning. While adults can survive up to 1 g atropine, doses as low as 0.2 mg/kg (equivalent to eating 2 berries in a 20 kg child) can be deadly in children [81, 70].
Belladonna’ scopolamine can have negative effects on memory, attention, and movement coordination at lower doses in elderly people .
- Allergy to belladonna, plants of the same family, and anticholinergic drugs
- Psychiatric and neurodegenerative disorders (Alzheimer’s, schizophrenia)
- Heart disease (coronary heart disease, congestive heart failure, irregular heart rate, high blood pressure)
- Digestive disorders (GERD, ulcers, constipation, colitis)
- Urinary disorders (urinary retention, prostatic obstruction)
To help avoid interactions, your doctor should manage all of your medications carefully. Be sure to tell your doctor about all medications, vitamins, or herbs you’re taking. Talk to your healthcare provider to find out how belladonna might interact with something else you are taking.
Belladonna may enhance the effects of other drugs that block the action of acetylcholine and increase the risk of anticholinergic poisoning. Some of these drugs are :
- Antipsychotics (olanzapine, chlorpromazine, clozapine, haloperidol)
- Antidepressants (amitriptyline, benztropine, imipramine, doxepin)
- Antihistamines (promethazine, carbinoxamine, clemastine, cyproheptadine)
- Anti-Parkinson’s medication (olanzapine, amantadine, biperiden, profenamine)
- Muscle relaxants (cyclobenzaprine, pancuronium)
- Drugs for respiratory disorders (tiotropium, ipratropium, oxitropium, fenoterol)
- Drugs for digestive disorders (clidinium, dicycloverine)
- Drugs for urinary disorders (bethanechol, oxybutynin)
- Drugs for heart disease (quinidine)
- Eye drops (cyclopentolate)
- Ambenonium (drug for myasthenia gravis)
- Cisapride (drug used to increase gut flow)
- Procainamide (drug for irregular heart rate)
- Drugs for Alzheimer’s disease (tacrine, donepezil, rivastigmine, galantamine)
- Bellergal (0.1 – 0.2 mg belladonna alkaloids, 0.3 – 0.6 mg ergotamine tartrate, and 20 – 40 mg phenobarbital)
- Donnatal (0.1037 mg hyoscyamine sulfate, 0.0194 mg atropine sulfate, 0.0065 mg hyoscine hydrobromide, and 16.2 mg phenobarbital)
- Cafergot (0.125 belladonna alkaloids, 100 mg caffeine, 1 mg ergotamine, and 30 mg pentobarbital sodium)
- Oral tincture (0.3% belladonna)
- Capsules (10 mg belladonna extract and 50 mg papaverine)
- Suppositories (15 – 16.2 mg belladonna and 30 – 65 mg opium)
- Plasters (0.25% belladonna alkaloids)
Because belladonna is not approved by the FDA for any conditions, there is no official dose. Users and supplement manufacturers have established unofficial doses based on their experience.
In clinical trials, the most effective doses of medicines containing belladonna were:
- Irritable bowel syndrome: belladonna 8 – 10 mg, 2x – 6x/day [3, 42]
- Menopausal complaints: Bellergal (0.2 mg alkaloids), 2x/day [6, 46]
- Headache: Bellergal-ergotamine-phenobarbital (0.2 mg alkaloids), 2x/day 
- Premenstrual symptoms: Bellergal (0.2 mg alkaloids), 3x/day 
- Anxiety: Bellergal (0.1 mg alkaloids), 4x/day 
- Airway obstruction: Oral tincture (supplying 0.01 mg/kg atropine), 1x – 2x/day [54, 5]
- Surgical pain: One suppository (16.2 mg belladonna) before surgery [50, 51]
The opinions expressed in this section are solely those of belladonna users who may or may not have medical or scientific training. Their reviews do not represent the opinions of SelfDecode. SelfDecode does not endorse any specific product, service, or treatment.
Do not consider user experiences as medical advice. Never delay or disregard seeking professional medical advice from your doctor or other qualified healthcare providers because of something you have read on SelfDecode. We understand that reading individual, real-life experiences can be a helpful resource, but it is never a substitute for professional medical advice, diagnosis, or treatment from a qualified healthcare provider.
People used generic and brand-name (Bellergal, Donnatal, and Cafergot) tablets containing Belladonna mainly for menopausal complaints, irritable bowel syndrome, and headaches. Most of them were satisfied and reported a fast relief of symptoms such as hot flashes, night sweating, pain, diarrhea, and spasms.
Although most users noticed no side effects, a few experienced sleepiness, dizziness, nausea, skin rashes, involuntary movements, or memory losses. Some users became dependent on medications that combined belladonna and phenobarbital.
People using belladonna-opium suppositories for pain relief in the urinary and digestive tracts were usually satisfied with the results and reported high reductions of pain, spasms, and urination frequency.
Most effects of medicines containing belladonna have been evaluated in only one or two clinical trials, a lot of which are from the 1950s – 1970s.
The effects of belladonna alkaloids as antidotes to some poisons have only been tested in animals.
Additionally, some studies were funded by the companies selling the remedies, most health claims were investigated in only one study, and one (improvement of epilepsy) was only tested in dogs.
Belladonna is a plant rich in alkaloids with a dark past — deadly in high amounts and potentially useful at lower doses. Its combination with other drugs may improve irritable bowel disease, menopausal complaints, headaches, and surgical pain. At the doses prescribed by doctors or contained in properly diluted homeopathic remedies, belladonna is generally safe.
However, exceeding the doses or eating the plant can cause severe poisoning. Overall, safer and more effective alternatives are out there for most conditions belladonna can be used for.