Ketamine has been the commonest abusive substance used by Hong Kong teenager since 2005. It is also the fourth commonest poison encountered in Hong Kong Poison Information Centre (HKPIC) poisoning data in 2010. From June 2008 to July 2011, HKPIC managed 188 and 96 cases of acute and chronic ketamine poisoning, respectively, which reflect its acute and chronic toxicity pattern. Demographically, there is a male predominance, and the majority is between the ages of 10-39. For the acute cases, 48 % presented with neurological features such as confusion, drowsiness, or transient loss of consciousness which usually subside with supportive care in a few hours. For the chronic cases, 92 % of them presented with features of ketamine cystitis while about 66 % presented with chronic abdominal pain. The current understanding of ketamine cystitis and chronic abdominal pain will be reviewed. Management is primarily symptomatic measures and most importantly abstinence from ketamine use.

Background: Adrenaline autoinjectors (AAInj) facilitates early administration of adrenaline and remains the first-line treatment for anaphylaxis. However, only a minority of anaphylaxis survivors in Hong Kong are prescribed AAInj and formal guidance do not exist. International anaphylaxis guidelines have been largely based on Western studies, which may not be as relevant for non-Western populations. Objective: To formulate a set of consensus statements on the prescription of AAInj in Hong Kong. Methods: Consensus statements were formulated by the Hong Kong Anaphylaxis Consortium by the Delphi method. Agreement was defined as greater than or equal to 80% consensus. Subgroup analysis was performed to investigate differences between allergy and emergency medicine physicians. Results: A total of 7 statements met criteria for consensus with good overall agreement between allergy and emergency medicine physicians. AAInj should be used as first-line treatment and prescribed for all patients at risk of anaphylaxis. This should be prescribed prior to discharge from the Accident and Emergency Department together with an immediate referral to an allergy center. The decision for prescribing AAInj should be based

Please note that author given name and surname were inadvertently transposed in this article as original published.Chan Yiu-Cheung should have read Yiu-Cheung Chan.The original article has been corrected.Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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