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Calcium tablets
Keywords: Calcium, Calcichew®, Calsorin®, Kalcipos®
A single dose of calcium tablets is unlikely to cause symptoms. Does not require treatment.
However, some products may contain sweeteners, which may cause gastrointestinal symptoms.
Candles
A single dose is considered harmless. Does not require treatment.
Car lock de-icer
Depending on the ingredients, see isopropanol or glycols.
Carbon monoxide
Keywords: CO, carbon monoxide
First aid includes breathing fresh air and resting in a semi-sitting position.
If the patient develops other symptoms (nausea, vomiting, headache or fainting) or if you are unsure about the severity of CO exposure, seek medical assistance.
Cetirizine
Keywords: Alzyr®, Cetimax®, Cetirizin®, Heinix®, Histec®, Zyrtec®
Ingesting a few tablets or taking a few gulps of cetirizine mixture is not toxic and does not require specific treatment. If the ingested amount is greater, contact the Poison Information Centre to confirm toxicity.
Chalk
Keywords: Crayons, board chalk, wax pastel
A single dose is considered harmless. Does not require treatment.
Cigarette
Children over the age of 1 year: Ingesting less than one whole cigarette or three cigarette butts does not require treatment.
If the ingested amount is greater or the child is under the age of 1, contact the Poison Information Centre.
Citric acid
Citric acid itself is not corrosive. If a small gulp has been ingested, rinse the mouth.
Clitocybe -species (Clitocybe)
Many Clitocybe –species contain muscarine, which cause symptoms in the nervous system. The symptoms usually begin within 30 min-2 hours. Sweating, increased salivation, lacrimation, nausea, vomiting and diarrhea are the typical symptoms.
Ingestion of a small amount (less than 2-3 cubes of sugar) does not require any treatment. If ingested in greater amounts administer activated charcoal and seek medical assistance. Contact the Poison Information Center if someone has ingested Clitocybe -species. Save the mushroom for possible identification afterwards.
Common ink cap (Coprinus atramentarius)
Common ink cap is edible. It can cause antabuse-like reactions (for example flushed face, nausea and palpitations), if consumed with alcohol. If ingestion with alcohol is suspected, contact the Poison Information Center. Save the mushroom for possible identification afterwards.