Patient Rights in Adverse Drug Reactions: How Drug Injury Victims Can Seek Legal Remedies

This does not constitute legal advice. Consult a solicitor for your specific case.

Hong Kong’s pharmaceutical market is projected to reach HKD 18.4 billion by 2026, driven by an ageing population and increased access to advanced biologics. This growth brings a corresponding rise in reported adverse drug reactions (ADRs). In 2024, the Hospital Authority received 4,287 ADR reports, a 12% increase from 2023, according to data published in the Hong Kong Medical Journal. For patients who suffer serious injury—ranging from permanent organ damage to anaphylactic shock—the immediate medical priority is treatment. The secondary concern, however, is legal recourse. Hong Kong does not operate a no-fault compensation scheme for drug injuries, unlike New Zealand or parts of Scandinavia. Victims must therefore navigate the existing tort framework, primarily negligence and breach of statutory duty. This article outlines the procedural pathways, key deadlines, and evidentiary burdens that a drug-injury victim must understand before entering litigation or alternative dispute resolution (ADR).

The Regulatory Framework for Drug Safety in Hong Kong

Hong Kong’s pharmaceutical regulation is a dual-track system. The Department of Health (DH) oversees the registration and safety surveillance of pharmaceutical products under the Pharmacy and Poisons Ordinance (Cap. 138). The Hospital Authority (HA) governs drug procurement and clinical governance within the public sector. Understanding this framework is the first step for any victim because it determines who may be liable.

The Role of the Department of Health and the Pharmacy and Poisons Board

The legislation provides that no pharmaceutical product may be sold or distributed in Hong Kong unless it is registered with the Pharmacy and Poisons Board. The manufacturer or importer must submit safety, efficacy, and quality data. Once registered, the DH operates a voluntary Adverse Drug Reaction Reporting System. This system is not a mandatory reporting mechanism for all healthcare professionals, though the HA requires its doctors to report serious ADRs.

For a victim, a critical procedural rule is that the DH’s registration of a drug does not constitute a guarantee of safety. The ordinance does not create a statutory duty of care owed by the DH or the Board to individual patients. A claim against the regulator for negligent approval would face a high hurdle under the principle of public authority immunity, as established in Yuen Kun Yeu v Attorney General of Hong Kong (1987). The court procedure is to examine whether the regulator acted in bad faith or with reckless disregard—a standard rarely met.

Hospital Authority Drug Formulary and Clinical Governance

The HA maintains a Drug Formulary that lists all drugs available in public hospitals and clinics. The formulary is revised quarterly by a central committee. If a patient suffers an ADR from a drug on the formulary, the potential defendants include the prescribing doctor, the administering nurse, and the HA itself as the employer.

The HA’s internal clinical governance guidelines, such as the Guidelines on Management of Adverse Drug Reactions, require that an ADR be documented in the patient’s record and reported through the HA’s internal system. A failure to do so can be used as evidence of a breach of the standard of care. However, the legislation does not give a private right of action for breach of these internal guidelines. The victim must still prove that the doctor’s conduct fell below the standard of a reasonably competent practitioner in the same specialty.

Establishing Liability: Negligence and Breach of Duty

The primary legal avenue for a drug-injury victim is a claim in negligence. The court procedure requires the plaintiff to prove three elements on the balance of probabilities: a duty of care was owed, that duty was breached, and the breach caused the injury.

The Duty of Care in Prescribing and Administering Drugs

The doctor-patient relationship automatically creates a duty of care. The standard is that of an ordinary skilled doctor exercising reasonable care and skill, as stated in Bolam v Friern Hospital Management Committee [1957]. This is an objective standard. A doctor who prescribes a drug outside its approved indications—known as “off-label” use—bears a higher burden to justify that decision. The court will examine whether the doctor obtained informed consent about the off-label use and the known risks.

For a hospital or clinic, the duty extends to the system of drug administration. A failure to check the patient’s allergy history, a dispensing error, or a failure to monitor for known side effects can all constitute a breach. The court procedure is to compare the defendant’s actions against a body of responsible medical opinion.

Proving Causation in Drug Injury Cases

Causation is often the most difficult element in drug-injury litigation. The victim must show that the drug caused the injury, not an underlying disease or another factor. The court applies the “but for” test: but for the drug, would the injury have occurred?

Medical expert evidence is essential. The court will typically order a joint expert report on causation. The parties may each instruct their own expert, but the court has the power to limit the number of experts under Order 38 of the Rules of the High Court (Cap. 4A). The legislation provides that the expert’s duty is to the court, not to the instructing party.

A common defence is that the injury was an “idiosyncratic reaction”—a rare and unpredictable response that no reasonable doctor could have foreseen. The victim must produce epidemiological evidence or case reports showing that the reaction was a known risk of the drug at the time of prescription. The Drug Office of the DH publishes periodic safety alerts, which can be used to establish that the risk was known to the medical community.

The Role of Alternative Dispute Resolution

Litigation in the Court of First Instance or the District Court is costly and time-consuming. For drug-injury claims, the court procedure can take 18 to 36 months to reach trial. ADR offers a faster, less adversarial path, but it requires the consent of both parties.

Mediation in Drug Injury Disputes

The court may order mediation as a case management step under Practice Direction 31. Mediation is a confidential process where a neutral third party facilitates negotiation. For drug-injury claims against the HA, the HA’s Claims Board has a policy of considering mediation for claims up to HKD 3 million. The victim’s solicitor should raise the possibility of mediation early in correspondence.

The advantage of mediation is that it allows for creative settlement terms beyond monetary compensation, such as an apology, a commitment to change clinical protocols, or funding for ongoing medical monitoring. The disadvantage is that the HA and private hospitals are often reluctant to admit liability in mediation, which can stall negotiations.

Arbitration: A Private Hearing

Arbitration under the Arbitration Ordinance (Cap. 609) is rare in drug-injury claims because it requires a prior agreement to arbitrate. Such an agreement is not standard in the doctor-patient contract. However, if a private hospital’s terms and conditions include an arbitration clause, the victim must pursue the claim through arbitration rather than the courts. The court procedure is to stay any court proceedings in favour of arbitration under section 20 of Cap. 609.

For claims under HKD 75,000, the Small Claims Tribunal has jurisdiction. The legislation provides that parties cannot be represented by lawyers in the Small Claims Tribunal, which may disadvantage a victim who needs expert medical evidence. The tribunal’s registrar can refer a claim to mediation, but cannot compel it.

Practical Steps for a Drug-Injury Victim

The court procedure imposes strict deadlines. A victim must act promptly to preserve evidence and comply with the limitation period.

Step 1: Preserve All Medical Records and Drug Samples

The victim should request a complete copy of all medical records from the treating hospital or clinic under the Personal Data (Privacy) Ordinance (Cap. 486). The records must include the prescription chart, administration records, and any allergy documentation. If the drug itself is available (e.g., a vial or blister pack), it should be retained in its original packaging. Photograph the drug and the packaging.

Step 2: Report the ADR to the Department of Health

The victim should file a report with the Drug Office of the DH using the voluntary ADR reporting form. While this report does not initiate legal proceedings, it creates an official record. The DH may issue a safety alert, which can be used as evidence in subsequent litigation. The report should be made within 30 days of the reaction.

Step 3: Obtain a Preliminary Medical Opinion

The victim should consult a specialist in the relevant field (e.g., a clinical pharmacologist or a specialist in the organ system affected) to obtain a preliminary opinion on causation. This opinion should address whether the drug was the likely cause and whether the standard of care was breached. The opinion will determine whether the claim is viable.

Step 4: Issue a Letter of Claim

The victim’s solicitor should issue a formal letter of claim to the potential defendant, setting out the factual basis, the alleged breach, and the quantum of damages. The letter should comply with the Pre-Action Protocol for Personal Injury Claims, which is not a formal rule but is followed by the courts. The defendant has 21 days to acknowledge the letter and three months to investigate and respond.

Step 5: Consider ADR Before Issuing a Writ

Before issuing a writ of summons, the victim should propose mediation. If the defendant refuses without reasonable cause, the court may impose cost sanctions at trial. The court procedure is to consider the conduct of the parties throughout the litigation, including their willingness to mediate.

Key Takeaways

• Report the adverse drug reaction to the Department of Health within 30 days to create an official record that can support your claim.
• Preserve all medical records, drug samples, and packaging immediately; the court will draw an adverse inference from spoliation of evidence.
• Obtain a preliminary medical opinion on causation from a specialist before issuing any legal proceedings to assess the viability of the claim.
• Propose mediation to the defendant before issuing a writ; a refusal to mediate without good reason may lead to cost sanctions at trial.
• File your claim in the District Court or Court of First Instance within three years of the injury, or within three years of discovering the injury, whichever is later, under the Limitation Ordinance (Cap. 347).