| | Conditions & Treatments | Cold & Flu Is rhus tox used only in rainy season? No, rhus tox is not used only in rainy seasons. It is a versatile homeopathic medicine that can be used irrespective of the season. Cold & Flu - Related Articles What Is Nasal Congestion? Common Cold Facts & Information How to Beat Chronic Bronchitis You keep being sick then getting hot and cold? Native American Uses of Echinacea Tennesseensis Oil of Oregano & Cold Prevention Fastest Way to Get Rid of a Cold