American Cranberry Toxic?

Updated 2026-03-06| 2 min read| 3,027 found this helpful

No documented cases of toxicity for this plant are found in existing scientific literature.

While ripe fruits are edible for humans, the plant is not appropriate for use as companion animal or livestock feed.

It can be confused with closely related species, some of which carry high toxicity risks.

FAQ

Is American Cranberry toxic to Humans?

No adverse symptoms reported; excessive unripe fruit intake may cause mild gastrointestinal upset. (Non-toxic)

Is American Cranberry toxic to Cats?

No documented toxicity symptoms; large intake of non-fruit material may lead to mild digestive discomfort. (Non-toxic)

Is American Cranberry toxic to Dogs?

No documented toxicity symptoms; large intake of non-fruit material may lead to mild digestive discomfort. (Non-toxic)

Is American Cranberry toxic to Horses?

No documented toxicity symptoms; large intake of non-fruit material may lead to mild digestive discomfort. (Non-toxic)

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Toxicity Details

Humans

Non-toxic

No adverse symptoms reported; excessive unripe fruit intake may cause mild gastrointestinal upset.

Cats

Non-toxic

No documented toxicity symptoms; large intake of non-fruit material may lead to mild digestive discomfort.

Dogs

Non-toxic

No documented toxicity symptoms; large intake of non-fruit material may lead to mild digestive discomfort.

Horses

Non-toxic

No documented toxicity symptoms; large intake of non-fruit material may lead to mild digestive discomfort.

Toxicity Snapshot

Toxic PartsNo toxic parts identified. Ripe cultivated fruits are edible for humans; the whole plant is not suitable for use as animal feed.

Exposure RouteIngestion of plant material is the only relevant exposure route.

Toxic CompoundsNo toxic compounds identified for this species in available scientific literature

First Aid & Prevention

First 30 Minutes

• Rinse mouth with clean water if large quantities of non-fruit plant material are ingested.
• Monitor for mild gastrointestinal upset for 2-4 hours post-ingestion.
• Remove remaining plant material from access to pets/livestock to prevent further intake.

Contact Vet Immediately

• If persistent vomiting, diarrhea, or lethargy occurs after ingestion.
• If a large quantity of non-fruit plant material is consumed by small companion animals.
• If you are uncertain if the ingested plant is American cranberry or a toxic lookalike.

Prevention

• Label cultivated cranberry plants if grown in areas accessible to pets and livestock.
• Learn to distinguish American cranberry from its highly toxic lookalike bog rosemary.
• Do not feed unprocessed whole cranberry plant material to animals as feed.

Treatment & Prognosis

• Supportive care for mild gastrointestinal symptoms if they occur.
• No specific antidote is required as no severe toxicity is reported for this species.
• Initiate immediate appropriate treatment if misidentification of a toxic lookalike is confirmed.

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Professional Toxicology

Scientific NameVaccinium macrocarpon Aiton; syn. Oxycoccus macrocarpus (Aiton) Pers.

AliasesLarge cranberry、Bearberry、Large-fruited cranberry、Grossfrüchtige Moosbeere (German)、Canneberge à gros fruits (French)、Ossicocco americano (Italian)

Toxicity Grade

HumansNon-toxic

CatsNon-toxic

DogsNon-toxic

HorsesNon-toxic

Target Organs

No specific organs are known to be targeted, as no toxicity cases have been reported

Mechanism of Action

• No toxic mechanism identified, as no toxicity has been documented for this species in published research

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle, sheep, goats: No documented toxicity; large intake of non-fruit plant material may cause mild digestive upset.

Small pet mammals (rabbits, guinea pigs): Ripe fruits may be fed as occasional treats in small quantities; excess intake may cause soft stools.

Confusion Risk

The following plants look similar and may be confused:

Other Vaccinium species Vaccinium spp.

Closely related with similar growth habit and berry appearance; all documented species in this group are non-toxic.

Bog rosemary Andromeda polifolia

Shares the same bog habitat and similar leaf shape; this species is highly toxic, unlike American cranberry.

Common bearberry Arctostaphylos uva-ursi

Shares the common name 'bearberry' and has similar berry appearance; this species is non-toxic.

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Related Toxic Plants

Bog rosemary

Andromeda polifolia

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Data Sources

1. CliniTox (Universität Zürich)

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.