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Common sunflower (Helianthus)
The plant is non-toxic.
Contraceptive pills
A single dose is considered harmless. Does not require treatment.
Coral bead plant (Nertera granadensis)
The plant is non-toxic.
Corn cockle (Agrostemma githago)
The plant is toxic, but ingesting a small amount rarely causes symptoms.
Corrosive substances
Keywords: sulfuric acid, nitric acid, hydrochloric acid, lye, soda, base
Orally: Rinse the mouth. If the person develops symptoms such as difficulties in swallowing, increased salivation, vomiting or abdominal pains, seek immediate medical assistance.
Skin and Eye: Rinse the skin and eyes immediately with water for 30-60 minutes. If pain, photophobia or other symptoms occur in the eye, seek medical assistance.
Corticosteroids (cortisone)
Keywords: Hydrocortisone, Hydrocortison®, Prednisolon®, Prednison®
A single dose of cortisone tablets or cream is considered harmless. In large amounts, creams may cause gastrointestinal symptoms. Does not require treatment.
Corydalis (Corydalis)
The plant is non-toxic.
Cosmos (Cosmos)
The plant is non-toxic.
Cotyledon (Cotyledon)
The plant is non-toxic.
Couch grass (Elytrigia repens)
The plant is non-toxic.