1, side effects of borneol: The side effects caused by borneol should not be underestimated, because borneol contains isoborneol. If it is used too much, it will cause gastrointestinal irritation, nausea, vomiting, abdominal pain and other serious reactions such as hepatomegaly and splenomegaly. Borneolum can also cause central nervous system excitement. Excessive use can cause convulsions, spasms, loss of consciousness, and some patients may die of respiratory failure. Secondly, there are also cases of allergic dermatitis caused by the use of borneol in clinic. When the preparation containing borneol is applied externally to treat hemorrhoids, the skin around the anus may be red, itchy and burning, and some scattered red papules may appear, but it will return to normal after appropriate antiallergic treatment after stopping the drug. Secondly, the allergic reactions caused by the use of constant borneol mainly include rash, systemic wind lump, laryngeal edema, palpitation, chest tightness, shortness of breath, scrotum and mouth and lip itching.

2. Borneolum is a cold drug, so it is not recommended for patients with weak qi and blood in clinic, otherwise it may lead to worse physical condition. Secondly, pregnant women taking borneol can cause abortion, so this medicine is not recommended for pregnant women. In addition, if children are frightened or have vomiting, diarrhea and other conditions, they should not take borneol, otherwise the original symptoms may be aggravated.