Pelargonium sidoides

Also Known As: Pelargonium sidoides, umckaloabo, South African geranium, Kaloba, Umcka, Zucol

Pelargonium sidoides is a medicinal plant native to South Africa. Its common names include umckaloabo and South African geranium. Root extract of Pelargonium sidoides is used as cold and flu medicine under various brand names including Kaloba, Umcka and Zucol. 

A 2013 Cochrane review found tentative evidence of benefit with Pelargonium sidoides for the symptoms of the acute bronchitis, the common cold and acute rhinosinusitis; however, the quality of the evidence was low to very low.[1]

A summary of this review found that all studies were "from the same investigator (the manufacturer) and performed in the same region (Ukraine and Russia)."[2]

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