1. The effect of camphor on the central nervous system can excite the central nervous system, especially the higher center, and act on the motor areas of the cerebral cortex and brain stem in large quantities, causing epileptic convulsions. The general dose of camphor has no obvious effect on the respiratory center, and some excitement can be seen in the case of extreme respiratory depression, mainly the reflex excitement caused by stimulating receptors during subcutaneous injection. For the vascular motor center, only when its function is extremely low can it be seen that it has an exciting effect on internal organs.
2. There are different reports about the effects on cardiovascular system. Some people think that camphor preparation has no effect on normal myocardium, but it has inhibitory effect at high concentration. In the isolated heart, it can only be excited when it causes failure, and it can also increase blood pressure by acting on the vascular movement center. Therefore, it is considered to be effective for circulatory failure or acute heart failure. However, there are also reports of skepticism or negativity. Oxa, a water-soluble metabolite OXA camphor in animals,
3. Local application of camphor has mild irritation and antiseptic effect on skin. Hard compress has a reddish effect. It can stimulate cold receptors to feel cool, relieve itching and pain, and has a slight local anesthesia effect. It also stimulates the gastrointestinal tract, making it warm and comfortable, but it will produce a lot of nausea and vomiting.
4. In vitro antifungal experiments have strong inhibitory effects on Microsporum wool and Trichophyton rubrum, which can completely inhibit their growth in Petri dishes. Oral camphor has the functions of expelling wind and slightly resolving phlegm.