Calamondin Orange Toxic?

Updated 2026-03-06| 3 min read| 4,851 found this helpful

Citrus mitis

Calamondin Orange is confirmed toxic to cats, dogs, and horses per ASPCA data, with no safe low-dose exposure threshold for these species.

Its core toxic components are naturally occurring essential oils and psoralens found across all plant parts.

Exposure can cause both immediate gastrointestinal symptoms and delayed photosensitive skin reactions in affected animals.

FAQ

Is Calamondin Orange toxic to Humans?

No severe toxicity reported for incidental small ingestion; high-dose skin contact with extracts may cause mild irritation or photosensitivity. (Low)

Is Calamondin Orange toxic to Cats?

Vomiting, diarrhea, lethargy/depression, potential photosensitive dermatitis (skin redness, blistering with sun exposure) (Moderate)

Is Calamondin Orange toxic to Dogs?

Vomiting, diarrhea, lethargy/depression, potential photosensitive dermatitis (skin redness, blistering with sun exposure) (Moderate)

Is Calamondin Orange toxic to Horses?

Vomiting, diarrhea, lethargy/depression, potential photosensitive dermatitis (skin redness, blistering with sun exposure) (Moderate)

Not sure which plant? Snap a photo to ID in 1 secondGet App

Toxicity Details

Humans

Low

No severe toxicity reported for incidental small ingestion; high-dose skin contact with extracts may cause mild irritation or photosensitivity.

Cats

Moderate

Vomiting, diarrhea, lethargy/depression, potential photosensitive dermatitis (skin redness, blistering with sun exposure)

Dogs

Moderate

Vomiting, diarrhea, lethargy/depression, potential photosensitive dermatitis (skin redness, blistering with sun exposure)

Horses

Moderate

Vomiting, diarrhea, lethargy/depression, potential photosensitive dermatitis (skin redness, blistering with sun exposure)

Toxicity Snapshot

Toxic PartsAll plant parts are toxic, with highest concentration of toxic compounds in fruit peels, leaves, and concentrated essential oil extracts.

Exposure RouteIngestion of any plant part, direct skin contact with concentrated essential oils or fresh sap, followed by UV light exposure for photosensitivity reactions.

Toxic CompoundsEssential oils; psoralens

First Aid & Prevention

First 30 Minutes

• For ingestion: Remove remaining plant material from the animal's mouth, rinse the mouth thoroughly with clean cool water.
• For skin exposure: Wash affected skin areas with mild pet-safe soap and cool water, keep the animal out of direct sunlight for 48 hours post-exposure.
• Do not induce vomiting or administer home remedies unless explicitly instructed by a licensed veterinarian.

Contact Vet Immediately

• The animal has ingested more than 1 small piece of the plant, or any amount of concentrated calamondin essential oil.
• Clinical symptoms including persistent vomiting, diarrhea, lethargy, or skin rash/redness develop after exposure.
• The exposed animal is juvenile, senior, or has pre-existing gastrointestinal or skin health conditions.

Prevention

• Keep potted calamondin plants, fallen leaves, and fruit out of reach of cats, dogs, and horses.
• Never feed calamondin fruit, peels, or homemade extracts to vulnerable animal species.
• Store all calamondin-derived essential oil products in sealed, animal-inaccessible containers.

Treatment & Prognosis

• Veterinary gastrointestinal decontamination (for recent large ingestions) and fluid therapy to address dehydration from vomiting/diarrhea.
• Topical anti-inflammatory treatment for severe photosensitive dermatitis, paired with strict sun avoidance for 72 hours post-exposure.
• Symptomatic monitoring of central nervous system function until all depression/lethargy signs fully resolve.

Emergency? Open PlantFun for real-time AI guidanceGet App

Professional Toxicology

Scientific NameCitrus mitis

AliasesCalamansi、Philippine Lime、Acid Orange

Toxicity Grade

HumansLow

CatsModerate

DogsModerate

HorsesModerate

Target Organs

Gastrointestinal tractSkinCentral nervous system

Mechanism of Action

• Essential oils irritate gastrointestinal tract mucosa, triggering vomiting and diarrhea, and can cause mild central nervous system depression at high doses.

• Psoralens bind to skin cell DNA when exposed to UV light, causing cell damage and photosensitive inflammatory dermatitis.

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Rabbits: Low to moderate toxicity; large ingestion may cause gastrointestinal stasis and mild acidosis.

Small rodents (guinea pigs, hamsters): Low risk for incidental small ingestion; large doses may trigger gastrointestinal upset.

Pet birds: Moderate risk; ingestion of peels or essential oils may cause digestive and respiratory irritation.

Confusion Risk

The following plants look similar and may be confused:

Kumquat Citrus japonica

Visually similar due to small, edible oval orange fruit; key difference is kumquat peels are sweet (calamondin peels are highly acidic) and kumquat contains far lower psoralen concentrations.

Key Lime Citrus aurantiifolia

Similar small, acidic fruit; key difference is fully ripe calamondin fruit has a bright orange hue, while key limes remain yellow-green at full maturity.

Use PlantFun to scan and avoid misidentificationGet App

Related Toxic Plants

Common Lemon

Citrus limon

Moderate toxicity for cats, dogs, and horses

Grapefruit

Citrus paradisi

Moderate toxicity for cats, dogs, and horses

Orange Jessamine

Murraya paniculata

Low to moderate toxicity for domestic animals

Download PlantFun App

Identify, grow and care for plants effectively!

Instant Plant ID

Take a photo to quickly identify plants.

Smart Care Reminders

Generate watering and care schedules.

Toxicity & Disease Diagnosis

Identify toxic plants and pests with treatment advice.

Data Sources

1. ASPCA Animal Poison Control

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

View Full Plant Wiki