What are the possible side effects of buspirone (BuSpar, BuSpar Dividose)? Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat. Call your doctor at once if you have a serious side effect such as: chest pain; feeling short or breath; or
Chronic toxicity. Repeated use of essential oils over many months or even years can produce adverse skin reactions and other health problems. Some common symptoms of chronic essential oils toxicity are nausea, headaches, lethargy and minor skin irritations.
Essential Oils to Kill Fleas. Essential oils are controversial for use on cats because felines lack a key enzyme that both humans and dogs use to process the oils. Thus, flea prevention in cats is more difficult when looking for natural options. However, some essential oils can be applied to cats when done properly and with veterinary supervision.