The Centre for Health Protection (CHP) of the Department of Health is investigating two sporadic cases of overdose of semen strychni (a Chinese medicine) affecting two women.
The first case involved a 54-year-old woman who developed symptoms of dizziness, vomiting and bilateral lower limbs cramps on November 9, 2007 after taking herbal broth. The broth was prepared by the woman according to an herbal formula she learnt it from a book.
She sought medical attention at United Christian Hospital on November 11 and was discharged on the same day when her symptoms subsided gradually.
Investigation revealed that she had actually doubled the dose recommended in the book. and laboratory result on Jan 10 this year confirmed the presence of semen strychni in the herbal remnant.
The second case was reported to CHP on December 6 in 2007. A 36-year-old woman presented with dizziness, muscle cramps and blurred vision shortly after taking herbal broth on December 3. She sought treatment at United Christian Hospital and hospitalization was not required.
It was revealed that the formula of the herbal broth was prescribed by a Chinese medicine practitioner but the woman altered the daily amount by consuming twice within a short period of time. Results of laboratory examination of the herbal broth on Jan 9 this year showed the presence of semen strychni which could account for her symptoms.
Toxic components of semen strychni were found in both patients' urine.
A DH spokesman said semen strychni is a toxic Chinese herbal medicine for pain and swelling relief. The unprocessed form is for external use in general and is included in the Schedule 1 of Chinese Medicine Ordinance. Processed semen strychni can be taken orally.
Over-dosage of semen strychni can cause intoxication and its symptoms include headache, dizziness, agitation, shortness of breath and muscle spasm. In severe cases, patient may have convulsion, asphyxiation or even death.
He called on members of the public to observe the following advice when taking Chinese medicine:
- When purchasing Chinese medicines, they should understand their own health problems and the relevance and nature of the medicines to be bought. Advice from Chinese medicine practitioners should be sought if there is any doubt; and
- To follow their Chinese medicine practitioners' instructions for preparation and consumption of any Chinese herbal products and do not adjust the dose and preparatory method by themselves.
The spokesman said members of the public should stop further consumption and seek medical advice as soon as possible if there is any discomfort after taking the herbal medicines.
Reprinted from HKSAR Government web page:
http://www.info.gov.hk/gia/general/200801/11/P200801110287.htm