Effect of Aqueous Extract of Violet on Fever in Patients with COVID-19: A Randomized Clinical Trial

Violet is a plant that has received interest in complementary medicine due to its anti-inflammatory, antipyretic, and antimicrobial effects. Fever is one of the major symptoms of COVID-19. This study was conducted to determine the effect of violet extract in the form of syrup on fever in patients with COVID-19.

In this randomized clinical trial, 52 patients with COVID-19 were studied in Intensive Care Unit in Amol Imam Khomeini Hospital (2021). In intervention group in addition to an injection of acetaminophen, 5 cc of violet extract syrup prepared from the aqueous extract of the plant was taken.  The temperature was recorded after 30 and 60 minutes and four hours. The follow-up of the patients continued for three days and the temperature was recorded every six hours.

There was a significant difference between the intervention group (36.84±0.37) and control group (37.13±0.62) in mean temperature at second time in second day of follow-up (P=0.04). Also, the mean temperature was found to be significantly different between the two groups at 30 (P=0.001) and 60 minutes (P=0.05) after the intervention. At other groups, there was no significant difference between the intervention and control groups.

The aqueous extract of violet plant in the form of syrup reduces fever in patients with COVID-19 causing no complication. Due to the ease of access to this herbal product, it can be used to prevent problems caused by fever.