A doctor became tearful and said his future would be ruined when confronted about allegedly tainted cold syrup dispensed by his clinic, a court heard yesterday. Yeung Wai-ling, the mother of one of three children who complained of irritation and fatigue after taking the medicine, said she went to the Tung Chung clinic of Hin Lin-yee after noticing a strong smell of antiseptic alcohol from the mixture. She was giving evidence against Hin, who has pleaded not guilty in Tsuen Wan Court to five charges - one of selling an unregistered drug and four of selling a medicine unfit for human consumption. The court heard Hin, 38, had argued the medicine might have been tampered with after he dispensed it, and that he did not know the syrup, obtained from a pharmaceutical company, was not listed by the Health Department. The syrup was given to four young children, three of whom complained of the symptoms after taking it, the court was told. Ms Yeung said her son, then six, had four doses of the medicine in September 2006 and refused to take any more, saying it was irritating and made his throat hurt. The next day, she and her husband confronted the doctor, who also noticed the smell. When her husband said he would make a police report, the doctor appeared tearful and said his future would be ruined if they did, Ms Yeung said. The couple took their child to Queen Margaret Hospital after reporting to police with a letter written by the doctor and addressed to the hospital. Another witness, So Kwai-yau, said his two-year-old daughter had sweated and shivered soon after she took the medicine that same month. Another girl complained to her mother that the medicine was 'spicy', the court heard. Parents and relatives of the victims have denied they or anyone else tampered with the medicine. The doctor's nurse, Lo Siu-kuen, 52, also faces one charge of selling a drug unfit for humans. The court heard health officials found four 3.6-litre bottles of unregistered medicine that contained high levels of the antihistamine drug chlorpheniramine at the clinic. The trial continues today before magistrate John Glass.