South African geranium

About the plant

South African geranium is a perennial herb with rounded, velvety, gray-green leaves and slender stalks bearing deep burgundy, almost black flowers. Its thickened, dark roots are the main medicinal part; it is not interchangeable with ornamental garden geraniums.

Native to South Africa and Lesotho, it grows in grasslands and rocky habitats, often in areas with seasonal rainfall. Established plants can survive dry periods using their substantial underground roots.

The discovery

Southern African healers have long used Pelargonium roots for respiratory and digestive complaints. In the late nineteenth century, the Englishman Charles Stevens encountered a local root remedy while seeking treatment for tuberculosis and subsequently promoted it in Europe. His recovery story was not scientific proof, and the plant is not an established tuberculosis treatment. Modern research has instead focused on standardized root extracts for short-term respiratory infections.

Traditional uses

• Root preparations for coughs and chest complaints.
• Remedies for colds and sore throats.
• Traditional treatment of diarrhea and other digestive complaints.
• Historical use for tuberculosis, which is not supported as an effective treatment and must never replace antibiotic care.

Research details

How it's used

• If considering it for a short-term cold or cough, choose a regulated, clearly identified Pelargonium sidoides root extract. Studies commonly used the proprietary extract EPs 7630; other products may differ.
• Follow the specific product's age restrictions and dosing instructions. Liquid extracts and tablets are not automatically interchangeable.
• Do not substitute ornamental geraniums, homemade root preparations, or essential oils for studied extracts.
• Seek medical advice if symptoms persist beyond one week or worsen. Breathlessness, chest pain, coughing blood, or high or persistent fever require prompt assessment.

Safety

• Possible adverse effects include stomach upset, nausea, diarrhea, allergic reactions, and occasional nose or gum bleeding.
• Liver problems have been reported, although causality is uncertain. Stop use and seek care for yellowing skin or eyes, dark urine, or unusual fatigue; consult a clinician first if you have liver disease.
• Avoid during pregnancy and breastfeeding because adequate safety data are lacking. For children, obtain professional advice and follow local product age restrictions.
• Evidence mainly concerns short courses. Long-term safety is not established, and it must not replace prescribed treatment for asthma, pneumonia, or tuberculosis.

Drug interactions

• No well-established clinical drug interactions have been demonstrated, but interaction studies are limited.
• Discuss use with a clinician if taking anticoagulants or antiplatelet medicines, such as warfarin or clopidogrel, because bleeding has occasionally been reported. Its coumarins should not automatically be equated with warfarin.
• Check with a pharmacist if taking medicines that can injure the liver, given the reports of liver problems and uncertainty about combined risk.