Common Name
Silverleaf night shade, trompillo
Botanic Name
Solanum elaeagnifolium
Plant Family
A perennial weed of drier soils along roadsides, prairies, and unused areas,
Animals Affected
Cattle, sheep, goats, horses, pigs, people.
Toxic Principle
Tropane alkaloids, especially solanine, which has similar effects as atropine on the autonomic nervous system. Also directly irritating to the oral and gastric mucosa. Green plant and unripe fruits most toxic. Toxicity is not lost by drying.
A perennial, branching, erect, spiny plant reaching 1 meter in height. It has an extensive, spreading root system. The leaves and stems are covered with white hairs. Leaves are simple, thick, linear to lanceolate, alternate, with spines along the main veins. Flowers are blue to purple in color. Fruits are smooth, varicolored berries, turning yellow to orange when ripe.
Salivation, colic, intestinal stasis, diarrhea.
Muscle tremors, weakness,
There is no specific treatment. Supportive therapy including fluids and electrolytes, activated charcoal via stomach tube.
Cardiovascular system
Rapid heart rate, weak pulse.
Respiratory System
Labored breathing
Nervous System
Depression, drowsiness, incoordination, paralysis of rear legs, coma and death.
Reproductive System
May induce birth defects.
Based on clinical signs and evidence the plant has been consumed.
Special Notes
Consumption of silverleafed night shade by horses that have been concurrently treated with ivermectin may result in clinical signs of ivermectin toxicity. The S. elaeagnifolium increases brain levels of ivermectin causing severe depression, head pressing, ataxia, excessive salivation, and death in severe cases.
Silver leafed nightshade (Solanum elaeagnifolium)