Background: Geranium carolinianum
L. (Geraniaceae) is widely used for a variety of diseases including herpetic keratitis, eczema,
rheumatalgia etc. However, there is lack of relevant scientific research.
Materials and Methods: GCE (125, 250, 500mg/kg body weight) was evaluated for its pharmacological properties by using the acetic
acid-induced writhing test, the hot plate test and the fresh egg white-induced paw edema in rats. The dimethylbenzene-induced mouse
inflammation model and the lipopolysaccharide (LPS)-induced rat fever model were employed and the acute toxicity of GCE was also
assessed.
Results: The
Geranium carolinianum aqueous extract (GCE) significantly inhibited the writhing responses in mice, increased reaction time of
mice in the hot plate test, and suppressed the fresh egg white-induced paw edema in rats and the dimethylbenzene-induced ear edema in mice
whilst attenuating LPS-induced fever in rats in a dose dependent manner. Furthermore, no deaths were observed when mice were orally
administered GCE up to 14 g/kg body weight (approximately 553 times of clinical dose).
Conclusions: GCE possesses analgesic, anti-inflammatory and antipyretic activities and is non-toxic at the doses used. The results of this
study support the clinical use and effectiveness of
Geranium carolinianum as an analgesic, anti-inflammatory and antipyretic agent in folk
medicine.
