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Sudarsana Curna
Sudarsana Curna (Sudarshana churna) is a polyherbal Ayurvedic powder for fever, from Bhaishajyaratnavali, with Swertia chirata or Andrographis paniculata as chief ingredient; safety and COVID-19 trials exist.
Sudarshan Kriya
Sudarshan Kriya (SKY) is a rhythmic cyclical breathing technique of slow, medium, and fast breath cycles, created in 1982 by Sri Sri Ravi Shankar and taught by the Art of Living Foundation, studied for anxiety, depression, and PTSD.
Sudden arrhythmic death syndrome
Sudden arrhythmic death syndrome (SADS), also called autopsy-negative sudden unexplained death, is sudden cardiac death with a structurally normal heart and negative toxicology; family screening yields about 12% and molecular autopsy about 11%.
Sudden cardiac death in hypertrophic cardiomyopathy
Sudden cardiac death in hypertrophic cardiomyopathy is the leading cause of death in HCM; risk scores such as HCM Risk-SCD estimate five-year risk to guide implantable cardioverter-defibrillator decisions.
Sudden cardiac death of athletes
Sudden cardiac death of athletes: unexpected cardiac death during sport, the leading medical cause of athlete death. Incidence 0.24-6.8 per 100,000 person-years; causes differ by age; screening and AED-based prevention debated.
Sudden idiopathic hearing loss
Sudden idiopathic hearing loss (SIHL, ICD-11 AB55; also idiopathic sudden sensorineural hearing loss, 突聋) is unexplained inner-ear hearing loss developing within 72 hours, usually unilateral, treated urgently with corticosteroids.
Sudden infant death-dysgenesis of the testes syndrome
Sudden infant death-dysgenesis of the testes syndrome (SIDDT), also called TSPYL1-related syndrome, is a lethal autosomal recessive disorder of infants with testicular dysgenesis in 46,XY males, staccato cry, autonomic dysfunction, and death before 12 months from cardiorespiratory arrest; described mainly in Old Order Amish families.
Sudden sensorineural hearing loss
Sudden sensorineural hearing loss (SSNHL, sudden deafness): rapid ≥30 dB inner-ear hearing loss over 3 frequencies within 3 days, usually unilateral, 90% idiopathic, an ENT emergency treated with corticosteroids.
Sudden unexpected death in epilepsy
SUDEP (sudden unexpected death in epilepsy) is a sudden, non-traumatic, non-drowning death in epilepsy excluding status epilepticus. Key facts: 1.2/1,000 patient-years in adults, GTCS frequency as dominant risk factor, respiratory-cardiac arrest mechanism.
Sudi insulin
Sudi insulin (舒地胰岛素, insulin sudelidec, INS068, brand Rihengying) is Hengrui's long-acting basal insulin analog for adult type 2 diabetes; NMPA-approved 28 July 2026 as China's first independently developed long-acting insulin analog, non-inferior to glargine with lower nocturnal hypoglycemia.
Sudocrem
Sudocrem, a 1931 Dublin zinc oxide barrier cream by Thomas Smith, Teva-owned, treats nappy rash, eczema, and minor burns; 15.25-15.29% zinc oxide with lanolin and benzyl compounds.
Sudoterb
Sudoterb (LL 3858, LL-3858) is an orally active pyrrole anti-tuberculosis drug candidate developed by India's Lupin Ltd; MIC90 0.25 µg/mL, unknown mechanism, reached Phase IIa trials in India, development inactive.
Sugar substitute
Sugar substitute: also called non-sugar or non-nutritive sweetener. Ingredients replacing sugar, including aspartame, sucralose, stevia, monk fruit, sugar alcohols, and allulose; regulated via ADIs, with WHO 2023 advising against NSS for weight control.
Sugemalimab
Sugemalimab, sold as Cejemly and Eqjubi, is a fully human anti-PD-L1 monoclonal antibody developed by CStone Pharmaceuticals, first approved in China in 2021 for lung cancer.
Suggestion
Suggestion (psychology): uncritical acceptance of an idea, per MeSH; measured via suggestibility scales like HGSHS:A and the Gudjonsson Suggestibility Scales; distinct direct and interrogative forms, r = 0.50 overall in 2025 meta-analysis.
Suicidal ideation
Suicidal ideation, also called suicidal thoughts, is thinking about or planning suicide, from passive desire to be dead to active intent. About 15.6% of US adults experience it in their lifetime; risk scales predict suicide poorly, and CBT-based treatments reduce it.
Suicide
Suicide: death caused by self-injury with intent to die; over 720,000 deaths yearly, third leading cause among ages 15–29, 73% in low- and middle-income countries; preventable through means restriction, support, and WHO LIVE LIFE interventions.
Suicide among autistic individuals
Suicide among autistic individuals: elevated suicidal ideation (about 34%), attempts (24%), and roughly threefold higher suicide death risk versus non-autistic people, per meta-analyses and registry studies.
Suicide by cop
Suicide by cop, also known as police-assisted suicide or officer-assisted suicide, is when a suicidal person deliberately threatens police with a weapon so officers shoot in self-defense.
Suicide by electrocution
Suicide by electrocution, a rare method of suicide caused by electric current, about 0.2% of UK suicides (222 of 102,163, 2005-2021), one quarter of electrocution deaths in autopsy series, with cardiac arrhythmia as the fatal mechanism.
Suicide by firearm
Suicide by firearm: a suicide committed with a gun; the leading method of US suicide (27,300 deaths, over half in 2023) and the most lethal method (about 89.6% case fatality), addressed through lethal means counseling, secure storage, and ERPOs.
Suicide by jumping from height
Suicide by jumping from height: a lethal but uncommon suicide method from bridges, buildings, cliffs, and terraces. Barriers and nets at hotspots cut site suicides by roughly 90%; displacement evidence is mixed.
Suicide by poisoning
Suicide by poisoning: intentional ingestion or introduction of toxic substances such as pesticides, medications, or household chemicals as a suicide method; a leading method worldwide, especially pesticide self-poisoning in low- and middle-income countries, with case fatality varying by agent and strong evidence that means restriction saves lives.
Suicide gene therapy
Suicide gene therapy, also called gene-directed enzyme prodrug therapy (GDEPT), is a cancer treatment in which tumor cells are given a gene that converts a harmless prodrug into a toxin.
Suicide in India
Suicide in India: major public health issue; MDS estimated ~187,000 deaths in 2010 (ages 15+), NCRB reported rate 12.4 per lakh in 2022; Mental Healthcare Act 2017 decriminalized suicide; NSPS 2022 targets 10% reduction by 2030.
Suicide in Japan
Suicide in Japan (自殺): peaked at 31,755 deaths in 1998 after the Asian financial crisis, fell over 35% from 2006 to 2022 to 20,320 in 2024 under the Basic Act on Suicide Countermeasures, while student suicides hit records in 2024-2025.
Suicide in Lesotho
Suicide in Lesotho: exceptionally high estimated rates (87.5 per 100,000 age-standardised, 2019), the world's highest female rate, rising 2000–2019 trends, modelled WHO data of uncertain quality, and a mental health system only now gaining a national policy.
Suicide in Lithuania
Suicide in Lithuania: the EU's highest suicide death rate, 18.8 per 100,000 in 2023, about halved since 2000 but stalled since 2022; governed by the National Suicide Prevention Action Plan 2023–2026 targeting 16.6 per 100,000 by 2026.
Suicide in South Korea
South Korea has generally held the highest suicide rate among OECD member states since 2003, recording 29.1 deaths per 100,000 in 2024, compared to 27.8 in 2025.
Suicide in the United Kingdom
Suicide in the United Kingdom: 7,147 deaths registered in 2024; England and Wales rate 11.4 per 100,000, male rate 17.6 versus female 5.7; coroner-certified with long registration delays; devolved prevention strategies in all four nations.