Medical torture describes the involvement of, or sometimes instigation by, medical personnel in acts of torture, either to judge what victims can endure, to apply treatments which will enhance torture, or as torturers in their own right. Medical torture overlaps with medical interrogation if it involves the use of professional medical expertise to facilitate interrogation or corporal punishment, in the conduct of torturous human experimentation or in providing professional medical sanction and approval for the torture of prisoners. Medical torture also covers torturous scientific (or pseudoscientific) experimentation upon unwilling human subjects.

Medical ethics and international law Medical torture fundamentally violates medical ethics, which all medical practitioners are expected to adhere to. The Hippocratic Oath makes explicit statements against deliberate harm not in the patient's best interests. These statements are often translated as "I will prescribe regimens for the good of my patients according to my ability and my judgment" and "to never deliberately do harm to anyone, for anyone else's interest." (Note: these statements are formulations of the ethical principles of beneficence and non-maleficence.) In response to the Nazi human experimentation on prisoners during World War II, which were declared at the post-World War II Nuremberg Trials to be "crimes against humanity", the World Medical Association developed the Declaration of Geneva to supplant the dated Hippocratic Oath. The Declaration of Geneva requires medical practitioners to state "[I, the medical practitioner] will maintain the utmost respect for human life from its beginning even under threat and I will not use my medical knowledge contrary to the laws of humanity." The Nuremberg Trials also led to the emergence of the Nuremberg Code which explicitly outlines the boundaries of acceptable medical experimentation. Additionally in response to the Nazi atrocities, the Geneva Conventions of 1949 outright prohibits the torture of prisoners of war and other protected non-combatants. The World Medical Association Declaration of Tokyo (1975) makes a number of specific statements against torture, including "The doctor shall not countenance, condone or participate in the practice of torture". Also the UN Convention Against Torture, which applies to medical personnel in addition to law enforcement officers, military personnel, politicians, and other persons acting in an official capacity, prohibits the use of torture under any circumstance. Under Article 2(2) of the Convention, it states that "No exceptional circumstances whatsoever, whether a state of war or a threat of war, internal political instability or any other public emergency, may be invoked as a justification of torture." The UN Principles of Medical Ethics relevant to the Role of Health Personnel, particularly Physicians, in the Protection of Prisoners and Detainees against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment (UN.1982) applies specifically to medical and other health workers but it has no implementation mechanism to ensure enforcement. It is up to state, provincial, and national bodies to enforce the standards in the document. The development of command responsibility established criminal liability for all people, including physicians, involved in crimes against humanity.

There remain gaps in regulation relating to medical torture in many countries. A higher standard of behaviour is expected of health professionals yet the UN Principles of Medical Ethics are not enforceable when governments are complicit in violations. This higher standard is reflected in the principles of beneficence, non-maleficence (above all do no harm), autonomy, justice, dignity and informed consent and these are not covered comprehensively by the UN Convention Against Torture.

Examples Between 1937 and 1945, Japanese medical personnel who were part of Unit 731 participated in the torture and murder of as many as 10,000 Chinese, Russian, Korean, American and other prisoners as well as Allied POWs during the second Sino-Japanese War. During World War II, inmates in Nazi concentration camps were subjected to medical experiments. Josef Mengele was the most notorious perpetrator, earning him the nickname "Angel of Death". Some doctors also ensured that inmates were painfully executed. For example, Hermann Fischer-Hüllstrung, who played a role in executing notable inmates such as Dietrich Bonhoeffer, "had the job of reviving political prisoners after they had been hanged until they were almost dead, in order to prolong the agony of their dying." Between 1970 and 1971, British security forces used the five techniques against a number of detainees in Northern Ireland during the Troubles. After this came to the Irish government's attention, they filed a case to the European Commission for Human Rights, who ruled that use of the five techniques constituted torture. However, the European Court of Human Rights subsequently ruled that usage of the five techniques did not constitute torture but still qualified as cruel, inhuman or degrading treatment. In Soviet mental hospitals used to detain political prisoners, dissidents were forcibly treated with psychotropic drugs, including high doses of neuroleptics, used as a means of punishment and control rather than for therapeutic purposes. Soviet psychiatrists used "sluggish schizophrenia" concepts, which allowed political dissent and other forms of non‑conformity to be defined as mental illness and used to justify indefinite psychiatric detention. In 1978, Khmer Rouge medical personnel at the Tuol Sleng security prison in Phnom Penh carried out "pisaot menuh" ("human experiments") on at least seventeen detainees, recording the procedures and outcomes in a notebook later recovered by investigators. "Aversion Project" documented that gay conscripts in the South African Defence Force (SADF) during the apartheid era were forced to submit to "curing" their homosexuality, including electric‑shock aversion therapy and, in some cases, coerced sex reassignment procedures carried out in military hospitals. Various commentators have argued that electroconvulsive therapy (ECT) and prefrontal lobotomy have at times been used not in the patient’s best interests but as punishment or to make patients easier to manage. A widely cited example is the Lake Alice child and adolescent unit in New Zealand, where a Royal Commission of Inquiry found that many of the 362 children and young people admitted between 1972 and 1978, often without any diagnosed mental illness, were subjected to unmodified ECT and paraldehyde injections used as punishment and to instill fear, amounting to torture. The New Zealand government has established a dedicated redress scheme for survivors of these abuses. World Health Organization guidance on mental health law has stated that there are no indications for unmodified ECT and that it should not be used, and that ECT is not recommended for children and should be prohibited through legislation.

In 2016, a group consisting of 71 British medical doctors urged that Israel's membership in the World Medical Association should be revoked, alleging that Israeli doctors performed state-endorsed "medical torture" on Palestinians. However, no official motion for expulsion was ever filed.

Purported medical or professional complicity

United States of America According to the Center for Constitutional Rights' When Healers Harm campaign, health professionals were complicit in the torture and abuse of detainees during U.S. President George W. Bush's "war on terror". Health professionals, including medical doctors, psychiatrists, medical examiners, psychologists, and nurses, have been implicated in the torture and abuse of prisoners in CIA secret prisons and military detention centers, such as those in Guantánamo, Afghanistan, and Iraq.

Health professionals are accused of:

crafting abusive tactics and falsely legitimizing their use; advising interrogators on methods of abuse that would exploit prisoners' vulnerabilities; using medical procedures to harm prisoners; gauging pain and monitoring interrogations that risked leaving prisoners in need of treatment; checking prisoners to certify that they were capable of surviving additional abuse; conditioning medical or mental health treatment on cooperation with interrogation; sharing confidential patient information that was used to harm patients; covering up evidence of torture and abuse; and turning a blind eye to cruel treatment.

To date, no state licensing boards or professional associations have investigated – or recognized, in some cases – abusive conduct by individual members of their professions. In 2009, after years of denial, the American Psychological Association (APA) finally recognized that psychologists had engaged in torture. However, the APA has not recognized that psychologists were involved in the Bush Administration's torture policy. Some criticize the APA for failing to respond to allegations of "collusion between APA officials and the national security apparatus in providing ethical cover for psychologists' participation in detainee abuse."

Although the American Medical Association has made clear that physicians should not be involved in interrogations of any kind, it continues to insist that it has "no specific knowledge of doctors being involved in abuse or torture," despite evidence to the contrary, including government documents and Office of Legal Counsel memos, a report by the International Committee of the Red Cross and multiple accounts by survivors.

Israel British doctors and medical journals have repeatedly accused and documented Israeli medical personnel of participating in torture. The first accusations surfaced in 1993 where doctors in military employ as well as in hospitals were implicated. Global health journalist Anne Gulland's accusation that Israeli doctors were "involved in torture, either directly or indirectly" was echoed in 1996 by Forrest and in 2013 by Devi.

In 2024, the director of Gaza City's al-Shifa Hospital, the paediatrician Mohammed Abu Salmiya reported that Israeli doctors and nurses participated in beatings and torture of prisoners at the notorious Sde Teiman camp.

The documentary Gaza: Doctors Under Attack featured an Israeli medical professional who witnessed Israeli medical personnel performing a painful procedure without anesthesia as a form of vengeance, and "recognized it as intentional torture".

Other accounts Some other accounts of medical or professional complicity in torture include: The SERE ("Survival, Evasion, Resistance and Escape") program's chief psychologist, Col. Morgan Banks, issued guidance in early 2003 for the "behavioral science consultants" who helped to devise Guantánamo's interrogation strategy although he has emphatically denied that he had advocated the use of SERE counter-resistance techniques to break down detainees. The New Yorker notes that in November, 2001 Banks was detailed to Afghanistan, where he spent four months at Bagram Air Base, "supporting combat operations against Al-Qaeda and Taliban fighters". Confidential medical records of Guantánamo prisoners were used to identify physical and psychological weaknesses that could be exploited during abusive interrogation. A 2005 report by Human Rights Watch suggested that torture was routine under the appointed Iraqi government. Dr. J. C. Carothers, British colonial Kenyan psychiatrist, has been implicated by some recent academic historians in designing interrogation of Mau Mau prisoners. His advice was published by the Kenya Government as The Psychology of Mau Mau, in 1954.For discussion of Carothers involvement with Mau Mau in Kenya in the 1950s: