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Substances, plants and mushrooms

The list contains the most frequently asked about and most common causes of poisoning in humans. You can search for items by typing in a search word. If you do not find the item you are looking for, you may call the Poison Information Center 0800 147 111 to check if it is poisonous.

Plant and mushroom species and genera are listed depending on whether all species of a genus are poisonous or only some. Unfortunately, the Poison Information Center is not able to identify plants and mushrooms over the phone. Identification should always take place on the spot.

In addition to books on mushroom identification, mushroom experts can help you identify mushrooms. Experts can be found via mycological societies and the Martha Organization, for example.

To Poison Information Center's main page

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Remo-Wax® ear drops

Substances

In small doses, ear drops accidentally administered orally are harmless and do not require special treatment.​ In the eye: Rinse with plenty of water for about 15 minutes. If symptoms (such as severe pain, swelling, sensitivity to light or tearing) develop during the next hours, take the patient to the doctor.

Rhododendron (Rhododendron)

Plants

The plant is toxic, but ingesting a small amount rarely causes symptoms.

Rhubarb [K] (Rheum rhaponticum)

Plants

The whole plant, and especially the leaves, contain toxic oxalates. Symptoms of poisoning reported include nausea, vomiting, abdominal pain, diarrhea, fatigue, and weakness. Kidney damage is possible. 

Stalk: Rhubarb stalks can be used for human consumption in moderation. If large amounts of raw stalks have been ingested and severe abdominal symptoms develop, seek medical attention. 

Leaves: If rhubarb leaves have been ingested, contact the Poison Information Center for a risk assessment.

Rosary pea, Paternoster pea (Abrus precatorius)

Plants

Highly toxic. The whole plant and especially the seeds contain the toxic substance abrin. Typical symptoms include vomiting and diarrhea, followed by drowsiness, confusion, hallucinations, changes in the level of consciousness, and convulsions. Kidney and liver damage has been reported. If the plant has been ingested, the patient should seek medical attention.

Rose (Rosa)

Plants

The plant is non-toxic.

Rosemary (Rosmarinus officinalis)

Plants

The plant is non-toxic.

Rowan, Mountain-ash (Sorbus)

Plants

The plant causes local irritation. 

Raw berries: ​Monitoring at home is sufficient. If more symptoms develop, including severe vomiting, seek medical attention.

Cooked berries are non-toxic and edible. 

Rubber fig, Rubber plant (Ficus elastica)

Plants

The plant is non-toxic.

Ryegrass (Lolium)

Plants

The plant is toxic, but ingesting a small amount rarely causes symptoms.

Saffron [K] (Crocus sativus)

Plants

The plant is toxic, but ingesting a small amount rarely causes symptoms.

[K] = Can be used for human consumption in moderation.

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