A strong fragrance best known as an insect repellent. Used by the Chinese for headaches, migraines and rheumatism. Can be used as an antiseptic to sanitize kitchen counters, chopping blocks and cutting boards. Use candles scented with Citronella to repel insects. Avoid diffusion or inhalation by persons with heart problems as it increases the heart rate. This fragrance is considered to be pungent by many people.