Member of Sri Lanka Medical Association (Life member)

Council Member of SLMA for 2024

Member of the Expert Committee on Snakebite in Sri Lanka Medical Association and the Secretary of the Expert Committee on Snakebite

Member of Sri Lanka Association of Clinical Pharmacology & Therapeutics (SLACPT)

Member (Life) of Sri Lanka Association for the Advancement of Science (SLAAS)

Toxinology

Snakebites

Plant poisoning

Organophosphate poisoning

Drug overdose

*Hump-nosed pit viper (Genus: Hypnale) envenomation in Sri Lanka

*Clinico-epidemiology of Russell's viper (Daboia russelii) envenoming in wet zone of Sri Lanka

*Clinico-epidemiology of drug overdose in a tertiary care hospital in Sri Lanka

*Clinical trial on Sri Lanka specific antivenom for venomous snakebites

*Ratnapura snakebite cohort

• Namal Rathnayaka RMMK, Anusha Nishanthi Ranathunga PE, Kularatne SAM.(26 Oct 2023): Long-term health manifestations of hump-nosed pit viper (Genus: Hypnale) bites, Clinical Toxicology, DOI: 10.1080/15563650.2023.2265549

• Rathnayaka N, Ranathunga AN. Clinico-epidemiology of Drug Overdose in a Tertiary Care Hospital. Asia Pac J Med Toxicol,2024; 13(2): 65-70.

• R.M.M.K. Namal Rathnayaka, P.E. Anusha Nishanthi Ranathunga, Y.N.M.P. Abeyrathne, Damsara A. Kularatne, S.A.M. Kularatne. Acute compartment syndrome leading to fasciotomy, severe morbidity and long-term disabilities following Sri Lankan Green pit viper (Peltopelor trigonocephalus) envenomation. Toxicon. 2024;252:188179.

Publications regarding snakebites

• Namal Rathnayaka R.M.M.K., Kularatne S.A.M., Kumarasinghe K.D.M., Janaka Ranaweera, Nishanthi Ranathunga P.E.A. Ischemic brain infarcts and intracranial haemorrhages following Russell’s viper (Daboia russelii) bite in Sri Lanka. Toxicon. 2017; 125:70-73.
• Namal Rathnayaka R.M.M.K., Kularatne S.A.M., Kumarasinghe K.D.M., Jeganadan K., Nishanthi Ranathunga P.E.A. Two rare case reports of confirmed Ceylon krait (Bungarus ceylonicus) envenoming in Sri Lanka. Toxicon. 2017;127: 44-48.
• Namal Rathnayaka R.M.M.K., Kularatne S.A.M., Nishanthi Ranatunga P.E.A. Coagulopathy and extensive local swelling following Green pit viper (Trimeresurus trigonocephalus) envenoming in Sri Lanka. Toxicon. 2017;129: 95-99.
• Namal Rathnayaka R.M.M.K., Kularatne S.A.M., Ranathunga P.E.A.N., Kumarasinghe K.D.M., Rajapakshe R.P.V.J., Ranasinghe J.G.S. Prolonged coagulopathy, ecchymoses and microangipathic haemolytic anaemia following hump-nosed pit viper (Hypnale hypnale) bite in Sri Lanka. Wilderness & Environmental Medicine. 2017;28:253-258.
• Namal Rathnayaka R.M.M.K., Nishanthi Ranatunga P.E.A., Kularatne S.A.M. Epidemiology and clinical features of Green pit viper (Trimeresurus trigonocephalus) envenoming in Sri Lanka. Toxicon. 2017;137:99-105.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM, Radha Jayathunga, Rajapakse RPVJ, Ranasinghe JGS. Microangiopathic haemolytic anaemia following three different species of hump-nosed pit viper (Genus: Hypnale) envenoming in Sri Lanka. Wilderness Environ Med. 2018;29:94-101.
• Namal Rathnayaka R.M.M.K., Nishanthi Ranathunga P.E.A., Janaka Ranaweera, Krishantha Jayasekara, S.A.M.Kularatne. Cardiac arrest and atrial fibrillation following hump-nosed pit viper (Hypnale hypnale) envenoming. Toxicon. 2018; 148:33-39.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM. Kidney injury following envenoming by hump-nosed pit viper (Genus:Hypnale) in Sri Lanka: proven and probable cases. Trans R Soc Trop Med Hyg. 2018;00:1-12.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM. Thrombotic microangiopathy, haemolytic uremic syndrome and thrombotic thrombocytopenic purpura following hump-nosed pit viper (Genus: Hypnale) envenoming in Sri Lanka. Wilderness Environ Med. 2018;00:1-13.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM. Systemic bleeding including pulmonary haemorrhage following hump-nosed pit viper (Hypnale hypnale) envenoming: A case report from Sri Lanka. Toxicon. 2019;170:21-28.
• Kularatne SAM, Anuradha Colombage, Anslem de Silva, Vajira Weerasinghe, Namal Rathnayaka RMMK. Acute neuromuscular paralysis, rhabdomyolysis and long lasting neurological deficits in Ceylon krait (Bungarus ceylonicus) bites: Two authentic cases from a serpentarium in Sri Lanka. Toxicon X. 2019;4:100015.
• Namal Rathnayaka R.M.M.K, Anusha Nishanthi Ranathunga PE, Kularatne SAM. Venom induced consumption coagulopathy following hump-nosed pit viper (Genus: Hypnale) envenoming in Sri Lanka: Uncertain efficacy of fresh frozen plasma. Wilderness Environ Med. 2020;31(2):131-143.
• Namal Rathnayaka R.M.M.K, Nishanthi Ranathunga P.E.A., Kularatne S.A.M. Thrombotic microangiopathy following Hypnale zara (hump-nosed pit viper) envenoming: The first known case report from Sri Lanka. Wilderness Environ Med. 2020;31(1):71-77.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM. Pulmonary hemorrhage following Russell’s viper (Daboia russelii) envenoming in Sri Lanka. Asia Pac J Med Toxicol. 2020;9(2):72-76.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM. Sudden death following hump-nosed pit viper (Hypnale hypnale) bite. Wilderness Environ Med. 2021;32(1):125-127.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM. Kounis syndrome following Hypnale zara (hump-nosed pit viper) bite in Sri Lanka. Wilderness Environ Med. 2021;32(2):210-216.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM. Clinico-epidemiology of Hypnale zara (Hymp-nosed pit viper) envenoming in Sri Lanka. Trans R Soc Trop Med Hyg. 2021;0:1-10.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM. Paediatric cases of Ceylon krait (Bungarus ceylonicus) bites and some similar looking non-venomous snakebites in Sri Lanka: misidentification and antivenom administration. Toxicon, 2021;198:143-150.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM, Lalith Abeywardhana KP. Purpura fulminans following hump-nosed pit viper (Hypnale hypnale) envenoming: A rare complication of snakebites. Toxicon, 2021;202:110-114.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM. Thrombotic microangiopathy, hemolytic uremic syndrome and thrombotic thrombocytopenic purpura: Rare manifestations of Russell’s viper (Daboia russelii) envenoming in Sri Lanka. Asia Pac J Med Toxicol.2021;10(3):117-123.
• Namal Rathnayaka RMMK, Anusha Nishanthi Ranathunga PE, Kularatne SAM, Sugathadasa K. Therapeutic Plasma Exchange for Venom-Induced Thrombotic Microangiopathy Following Hump-Nosed Pit Viper (Genus: Hypnale) Bites: A Prospective Observational Study. Wilderness Environ Med. 2022;33(4):386-398.

• Namal Rathnayaka RMMK, Anusha Nishanthi Ranathunga PE, Kularatne SAM. Epidemiological and clinical features of hump-nosed pit viper (Hypnale hypnale and Hypnale zara) envenoming in children. PLoS Negl Trop Dis 2022;16(12): e0011013. https://doi.org/ 10.1371/journal.pntd.0011013.

• Namal Rathnayaka RMMK, Anusha Nishanthi Ranathunga PE, De Silva MLI, Y.N.M.P. Abeyrathna YNMP, Kularatne SAM. Cat-eyed snake (Genus: Boiga) bites in Sri Lanka: First authentic case series. Toxicon,2023;225(15)107052.

Publications regarding Toxicology

• Namal Rathnayaka R.M.M.K., Nishanthi Ranathunga P.E.A. 2017. Acute kidney injury, myocardial infarction and death following brake fluid poisoning; A case report. Asia Pac J Med Toxicol. 2017;6: 62-66
• Namal Rathnayaka R.M.M.K., Ranathunga P.E.A.N., Fernando R. 2017. Epidemiology and clinical profile of ‘Niyagala’ (Gloriosa superba) poisoning in Sri Lanka. American Journal of Toxicology. 2017;2(1):2-7.
• Namal Rathnayaka RMMK, Ranathunga PEAN. Clinico-epidemiology of Washing Powder (‘Prinso’) Poisoning in Sri Lanka. Asia Pac J Med Toxicol 2022;11(2):51-57.
• Namal Rathnayaka, Anusha Nishanthi Ranathunga, Bandusiri Rathnayaka, Kularatne SAM. Massive cerebral infarct following multiple honeybee stings. Ceylon Medical Journal 2021;66(3):151-153.

Publications regarding snakebites

• Namal Rathnayaka R.M.M.K., Kularathna S.A.M., Sugathapala A.G.H., Pathiraja P.M.C.K., Ranathunga P.E.A.N. A cobra bite -uncommon site of bite. Sri Lankan Journal of Anaesthesiology. 2015;23(2):89-90.
• Namal Rathnayaka R.M.M.K. and Ranathunga P.E.A.N. Acute kidney injury which leads to chronic kidney disease and death following hump nosed pit viper (Genus:Hypnale) envenoming. Journal of Ratnapura Clinical Society. 2016:40-42.
• Namal Rathnayaka R.M.M.K., Ranathunga P.E.A.N. Late onset of bilateral cerebral infarction following Russell’s viper (Daboia russelii) bite. Sri Lankan Journal of Anaesthesiology. 2017;25(1):35-38.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM, Radha Jayathunga, Kumarasinghe KDM, Jeganadan K. Epidemiology and haematological manifestations following Hump -nosed pit viper (Genus: Hypnale) envenoming in the region of Ratnapura (Sabaragamuwa Province - wet zone of Sri Lanka). Journal of Ratnapura Clinical Society. 2017;30-38.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM. Therapeutic plasma exchange (plasmapheresis) for the treatment of hump-nosed pit viper (Hypnale spp.) envenoming. J Ratnapura Clin Soc. 2018; 3:20-6.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA. Thrombotic microangiopathy and hemolytic uremic syndrome following Russell’s viper (Daboia russelii) bite. J Ratnapura Clin Soc. 2019:23-30.
• Namal Rathnayaka RMMK. Hump-nosed pit viper envenoming in Sri Lanka: challenges of managing complications. Journal of Ratnapura Clinical Society. 2022;5-9.
• K.V.D. Ranga Chamara, R.M.M.K.Namal Rathnayaka, Sunil Bawattage. Hump-nosed pit viper (Hypnale spp.) bites in Gampola-Sri Lanka. Journal of Ratnapura Clinical Society. 2024;7(1):20-21.

Publications regarding Toxicology

• Namal Ratnayaka R.M.M.K., Ranaweera J, Palihakkara P, Ranathunga P.E.A.N. Case report on profound central depression during treatment of tetanus with combined magnesium, midazolam, morphine & fentanyl. Sri Lanka Journal of Anaesthesiology. 2015;23:86-88.
• Namal Rathnayaka R.M.M.K., Wijekoon C N, Sugathapala A G H, Ranathunga P E A N. Indoxacarb-a rare cause of poisoning. Journal of the Ceylon College of Physicians.2016;47:46-47.
• Namal Rathnayaka RMMK, Ranaweera J, Kumarasinghe KDM, Ranathunga PEAN, Gunathilaka TB. Acute kidney injury, haemarrhagic pancreatitis, adult respiratory distress syndrome and death following washing powder ‘Prinso’ poisoning. Journal of Ratnapura Clinical Society. 2016;1:37-39.
• Namal Ratnayake R.M.M.K., Pathiraja C., Ranathunga A.N., Ischaemic changes in electrocardiography (ECG) after attempted suicide by hanging (transient left ventricular apical ballooning). Sri Lankan Journal of Anaesthesiology. 2015;23(1):39-42.
• Namal Rathnayaka RMMK, Jeganadan K, Dissanayake HDMSK, Ranathunga PEAN. Death due to poisoning with Gloriosa superba (‘Niyagala’) seeds. Journal of the Postgraduate Institute of Medicine. 2016;3:E26:1-3.
• Namal Rathnayaka R.M.M.K., Nishanthi Ranatunga P.E.A.N. Electrocardiographic (ECG) changes after attempted suicide by hanging. Journal of Ratnapura Clinical Society. 2017:14-19.
• Namal Rathnayaka R.M.M.K., Nishanthi Ranathunga P.E.A. Extensive T wave inversions on ECG following ‘Kaneru’ (Thevetia peruviana) poisoning. Sri Lankan Journal of Anaesthesiology. 2018; 26(2):147-149.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Gnanathasan CA. Acute liver failure following paraceatamol overdose: The importance of monitoring serum biomarkers. J Ratnapura Clin Soc. 2019:13-19.

Abstracts regarding snakebites

• Namal Rathnayaka R.M.M.K., Anusha Nishanthi Ranatunga, Kasun Fernando. Epidemiology and Clinical Features of Green Pit Viper (Trimerusurus Trigonocephulus) Envenomation. In: Proceedings of 12^th International Scientific Congress, APAMT-2013, Dubai, UAE. pp 02
• Namal Rathnayaka R.M.M.K., Kularatne S.A.M., Rajapakshe R.P.V.J., Ranasinghe J.G.S., Ranathunga P.E.A.N. Epidemiology and clinical manifestations of Hump-nosed pit viper (Genus:Hypnale) envenomation. In: Proceedings of Peradeniya University International Research Sessions (iPURSE)-2015. pp 219
• Namal Rathnayaka, R.M.M.K., Nishanthi Ranathunga, P.E.A., Kularatne, S.A.M., Rajapakse R.P.V.J. Epidemiology and clinical profile of Russell’s viper (Daboia russelii) envenoming in wet zone of Sri Lanka. In: Proceedings of 5^th Annual Conference of the Toxinological Society of India (TSICON)-2015, Kochi, India. pp 67
• Namal Rathnayaka R.M.M.K., Kularatne S.A.M., Rajapakshe R.P.V.J., Ranasinghe J.G.S., Ranathunga P.E.A.N. Kidney injury following hump nosed pit viper (Genus:Hypnale) envenomation. In: Proceedings of International Conference in Tropical Medicine-2015, University of Peradeniya, Sri Lanka. pp 52
• Namal Rathnayaka, R.M.M.K., Nishanthi Ranathunga, P.E.A., Kularatna S.A.M. Epidemiology and clinical profile of cobra (Naja naja) envenomation in wet zone of Sri Lanka. In: Proceedings of the International Postgraduate Research Conference (iprc)-2015, University of Kelaniya, Sri Lanka. pp141
• Namal Rathnayaka RMMK, Kularatne SAM, Ranathunga PEAN, Rajapakse RPVJ, Ranasinghe JGS. Species specific clinical manifestations following Hump-nosed pit viper (Genus: Hypnale) envenoming in Sri Lanka. In: Sri Lanka Medical Association 130^th Anniversary International Medical Congress. 13-16 July, 2017; Colombo, Sri Lanka. Ceylon Med J. (Suppl. 1). 2017;62:97.
• Namal Rathnayaka RMMK, Ranathunga PEAN, Kularatne SAM, Rajapakse RPVJ, Ranasinghe JGS. Clinico-epidemiology of Hump-nosed pit viper (Genus:Hypnale) envenoming in wet zone of Sri Lanka. In: Proceedings of National Research Symposium- 2017, Ministry of Health, Nutrition and Indigenous Medicine, Sri Lanka. pp 148-149
• Namal Rathnayaka RMMK, Ranathunga PEAN, Kularatne SAM. Cardiotoxic effects following Russell’s viper (Dabio russelii) envenoming in Sri Lanka. In: Sri Lanka Medical Association 130^th Anniversary International Medical Congress, Colombo 13-16 July 2017. Ceylon Med J. (Suppl. 1). 2017; 62:185.
• Namal Rathnayaka RMMK, Ranathunga PEAN, Kularatne SAM. Clinico-epidemiology of Russell's viper (Daboia russelii) bite in wet zone of Sri Lanka: A high incidence of thrombotic microangiopathy In: Sri Lanka Medical Association 131^st Anniversary International Medical Congress, Colombo 26-29 July 2018. Ceylon Med J. (Suppl. 1). 2018; 62:90-1
• Namal Rathnayaka RMMK, Kularatne SAM, Ranathunga PEAN, Rajapakse RPVJ, Ranasinghe JGS. Epidemiology and hematological manifestations following Hump-nosed Pit Viper (Genus: Hypnale) envenoming in Sri Lanka.16^th  Annual Scientific Congress of Asia Pacific Association of Medical Toxicology (APAMT) 8-10 November 2017, Kandy, Sri Lanka, Clinical Toxicology, 2017;56:7,712
• Namal Rathnayaka RMMK, Ranathunga PEAN, Kularatne SAM. Clinico-epidemiology of Russell's viper (Daboia russelii) bite in wet zone of Sri Lanka 16^th  Annual Scientific Congress of Asia Pacific Association of Medical Toxicology (APAMT) 8-10 November 2017, Kandy, Sri Lanka, Clinical Toxicology, 2017;56:7,697
• Namal Rathnayaka RMMK, Ranathunga PEAN, Kularatne SAM. Coagulopathy following hump-nosed pit viper (genus: Hypnale) bites in wet zone of Sri Lanka. In: Sri Lanka Medical Association 132^nd Anniversary International Medical Congress, Colombo 24-27 July 2019.Ceylon Med J.2019;PP 96.
• Namal Rathnayaka RMMK, Ranathunga PEAN, Kularatne SAM. Therapeutic plasma exchange (plasmapheresis): For hump-nosed pit viper (genus:Hypnale) envenoming. In: Sri Lanka Medical Association 132^th Anniversary International Medical Congress, Colombo 24-27 July 2019. Ceylon Med J. 2019; pp 96.
• Namal Rathnayaka RMMK, Rajapakse RPVJ, Nishanthi Ranathunga PEA, Kularatne SAM. In-vitro cytotoxicity of hump-nosed pit viper (genus: Hypnale) venoms in mouse fibroblast cell line L 929. In: Proceedings of National Research Symposium-2019, Ministry of Health, Nutrition and Indigenous Medicine, Sri Lanka. pp 183
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM. Thrombotic microangiopathy and hemolytic uremic syndrome following hump-nosed pit viper (genus: Hypnale) bites. In: Proceedings of Peradeniya University International Research Sessions (iPURSE)-2019. pp 139
• Edirisinghe L.E.A.D.A., Karunathilake K.J.K., Dissanayake D.A., Namal Rathnayaka RMMK, Kularatne S.A.M., Rajapakse R.P.V.J. In-vitro cytotoxicity assay on venom of highly venomous snakes in Sri Lanka. In: Proceedings of Peradeniya University International Research Sessions (iPURSE)-2019, September 11-12. pp139.
• Namal Rathnayaka RMMK, Ranathunga PEAN, Kularatne SAM. Clinico-epidemiology of Hypnale zara (hump-nosed viper) envenoming in Sri Lanka. In: Sri Lanka Medical Association 133^rd Anniversary International Medical Congress. 24-26 July, 2020; Colombo, Sri Lanka. Ceylon Med J. (Suppl. 1). 2020;PP10.
• Namal Rathnayaka RMMK, Ranathunga PEAN, Kularatne SAM. Clinico-epidemiology of hump-nosed pit viper (genus: Hypnale) envenoming in children. In: Sri Lanka Medical Association 134^th Anniversary International Medical Congress. 21-24 September, 2021; Colombo, Sri Lanka. PP138
• Namal Rathnayaka RMMK, Ranathunga PEAN, Kularatne SAM, Sugathadasa K. Venom induced thrombotic microangiopathy following hump-nosed pit viper (genus: Hypnale) envenoming: effectiveness of therapeutic plasma exchange. In: Sri Lanka Medical Association 134^th Anniversary International Medical Congress. 21-24 September, 2021; Colombo, Sri Lanka. PP 81.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM. Systemic manifestations and long-term effects of hump-nosed pit viper (hypnale spp.) envenoming in Sri Lanka: need of efficacious antivenom. 8^th International Conference of Sabaragamuwa University of Sri Lanka (ICSUSL) 1^st - 3^rd December 2021, pp 138.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM. Chronic kidney disease following hump-nosed pit viper (genus: Hypnale) bites. Ceylon Med J. 2022;67(2):9-10.
• Namal Rathnayaka RMMK, Nishanthi Ranathunga PEA, Kularatne SAM. Clinico-epidemiology of Hypnale nepa (Hump-nosed pit viper) bites in Sri Lanka. Ceylon Med J. 2022;67(2):72-73.
• Namal Rathnayaka RMMK, Ranathunga PEAN, Rajapakshe RPVJ, Wickramasinghe WDSJ. Identification of Hypnale Zara (Hump-nosed Pit Viper) Using the Nuchal Colour Bands. In: Proceedings of 12^thAnnual Research Sessions of the Sabaragamuwa University of Sri Lanka-2022, 6^th December 2022 Sabaragamuwa University of Sri Lanka, Belihuloya PP 49.
• Namal Rathnayaka RMMK, Ranathunga PEAN, Kularatne SAM. Epidemiological and clinical features of snakebites in children. In: Sri Lanka Medical Association 136^th Anniversary International Medical Congress. 25-28 July, 2023; BMICH Colombo, Sri Lanka. PP 81.
• Namal Rathnayaka RMMK, Ranathunga PEAN, Kularatne SAM. Postmortem findings of hump-nosed pit viper (Hypnale spp.) bites. In: Sri Lanka Medical Association 136^th Anniversary International Medical Congress. 25-28 July, 2023; BMICH Colombo, Sri Lanka. PP 91.
• Namal Rathnayaka RMMK, Ranathunga PEAN, Kularatne SAM. Cardiotoxic effects following hump-nosed pit viper (Hypnale spp.) bites. In: Sri Lanka Medical Association 136^th Anniversary International Medical Congress. 25-28 July, 2023; BMICH Colombo, Sri Lanka. PP 98.
• Namal Rathnayaka RMMK, Ranathunga PEAN, Madalagama U.M.C.S. Ratnapura snakebite cohort: One year experience. In: Sri Lanka Medical Association 137^th Anniversary International Medical Congress, Colombo. 16-18^th August 2024. Ceylon Med J. 2024 June;69(S):S150.
• Namal Rathnayaka RMMK, Ranathunga PEAN, Madalagama UMCS, Osudhihansi AGM. Paediatric snakebites in Ratnapura District. Conference Proceeding of Annual Academic Session 2024- Ratnapura Clinical Society. 2024;7(1):10.

Abstracts regarding Toxicology

• Namal Rathnayaka RMMK, Ranathunga PEAN, Fernando R. Cardiotoxic manifestations following Niyagala (Gloriosa superba) poisoning. In: Proceedings of National Research Symposium-2017, Ministry of Health, Nutrition and Indigenous Medicine, Sri Lanka. pp 355
• Namal Rathnayaka R.M.M.K., Ranathunga P.E.A.N., Fernando R. Epidemiology and clinical profile of ‘Niyagala’ (Gloriosa superba) poisoning in Sri Lanka, In: Sri Lanka Medical Association 130^th Anniversary International Medical Congress-2017. Ceylon Medical Journal, Volume 62 Supplement 1. pp 189
• Namal Rathnayaka RMMK, Ranathunga PEAN. Kidney injury following ‘Prinso’ (washing powder) poisoning in Sabaragamuwa province- Sri Lanka. In: Sri Lanka Medical Association 132^th Anniversary International Medical Congress, Colombo 24-27 July 2019. Ceylon Med J. 2019; pp 103.
• Namal Rathnayaka RMMK, Ranathunga PEAN. Clinico-epidemiology of drug overdose in a tertiary care hospital in Sri Lanka. In: Sri Lanka Medical Association 133^rd Anniversary International Medical Congress. 24-26 July, 2020; Colombo, Sri Lanka. Ceylon Med J. (Suppl. 1). 2020; pp 95
• Namal Rathnayaka RMMK, Ranathunga PEAN. Clinico-epidemiology of washing powder (‘Prinso’) poisoning. In: Sri Lanka Medical Association 133^rd Anniversary International Medical Congress. 24-26 July, 2020; Colombo, Sri Lanka. Ceylon Med J. (Suppl. 1). 2020; pp 94-95.
• Namal Rathnayaka RMMK, Ranathunga PEAN. Clinico-epidemiology of drug overdose in a tertiary care hospital in Sri Lanka. In: Sri Lanka Medical Association 133^rd Anniversary International Medical Congress. 24-26 July, 2020; Colombo, Sri Lanka. Ceylon Med J. (Suppl. 1). 2020; pp 95
• Namal Rathnayaka RMMK, Ranathunga PEAN. Clinico-epidemiology of washing powder (‘Prinso’) poisoning. In: Sri Lanka Medical Association 133^rd Anniversary International Medical Congress. 24-26 July, 2020; Colombo, Sri Lanka. Ceylon Med J. (Suppl. 1). 2020; pp 94-95.
• Namal Rathnayaka RMMK, Ranathunga PEAN. Clinico-epidemiology of ‘Hondala’ (Adenia hondala) poisoning. Conference Proceeding of Annual Academic Session 2022- Ratnapura Clinical Society. 2022;38.
• Namal Rathnayaka RMMK, Ranathunga PEAN. Clinico-epidemiology of tarantula (Poecilotheria spp.) bites in Sri Lanka. In: Sri Lanka Medical Association 137^th Anniversary International Medical Congress, Colombo 16-18^th August 2024. Ceylon Med J. 2024 June;69(S):S149.
• Namal Rathnayaka RMMK, Ranathunga PEAN. Clinico-epidemiology of brake fluid poisoning. In: Proceedings of Peradeniya University International Research Sessions (iPURSE)-2024, August 29-30. PP 85.
• Rathnayaka RMMKN, Ranathunga PEAN. Epidemiological and clinical features of centipede (Scolopendra spp.) bites: A single-center study. In: Proceedings of Annual Research Symposium-2024, Postgraduate Institute of Medicine- University of Colombo, Sri Lanka. October 25. PP 37.

(1) “Epidemiology and Clinical features of Green pit viper (Trimerusurus trigonocephulus) envenomation” presented at

 12^th Annual Congress of Asia Pacific Association of Medical Toxicology (APAMT) held at Zayed University Convention Centre, Dubai, UAE 21^st -23^rd November 2013

(2) “Epidemiology and clinical manifestations of Hump-nosed pit viper (Genus:Hypnale) envenomation” presented at

Peradeniya University International Research Sessions (iPURSE)-2015

(3) “Epidemiology and clinical profile of Russell’s viper (Daboia russelii) envenoming in wet zone of Sri Lanka” presented at

      5^th Annual Conference of the Toxinological Society of India-2015 (TSICON 2015).

(4) “Epidemiology and clinical profile of cobra (Naja naja) envenomation in wet zone of Sri Lanka” presented at the  

     International Postgraduate Research Conference (iprc), University of Kelaniya, Sri Lanka. 2015 December 10-11.

(5)  “Kidney injury following hump nosed pit viper (Genus:Hypnale) envenomation” Presented at the

    International Conference in Tropical Medicine. University of Peradeniya, Sri Lanka. 2015 December 10-11.

(6) “Species specific clinical manifestations following Hump-nosed pit viper (Genus: Hypnale) envenoming in Sri Lanka” Presented at the

      Sri Lanka Medical Association 130^th Anniversary International Medical Congress. Colombo 13-16 July 2017

(7) “Cardiotoxic effects following Russell’s viper (Daboia resselii) envenoming in Sri Lanka” Presented at the

   Sri Lanka Medical Association 130^th Anniversary International Medical Congress. Colombo 13-16 July 2017

(8) “Clinico-epidemiology of Hump-nosed pit viper (Genus:Hypnale) envenoming in wet zone of Sri Lanka” Presented at the

   National Research Symposium 2017, Ministry of Health, Nutrition and Indigenous Medicine, Sri Lanka. BMICH 4 and 5 December 2017

(9) “Cardiotoxic manifestations following Niyagala (Gloriosa superba) poisoning” Presented at the

   National Research Symposium 2017, Ministry of Health, Nutrition and Indigenous Medicine, Sri Lanka. BMICH 4 and 5 December 2017

(10) “Clinico-epidemiology of Russell's viper (Daboia russelii) bite in wet zone of Sri Lanka: A high incidence of thrombotic microangiopathy” Presented at the

   Sri Lanka Medical Association 131^st Anniversary International Medical Congress. Colombo 26-29 July 2018

(11) “Coagulopathy following hump-nosed pit viper (genus: Hypnale) bites in wet zone of Sri Lanka” Presented at the

   Sri Lanka Medical Association 132^nd Anniversary International Medical Congress. Colombo 24-27 July 2019

(12) “Kidney injury following ‘Prinso’ (washing powder) poisoning in Sabaragamuwa province- Sri Lanka” Presented at the

   Sri Lanka Medical Association 132^nd Anniversary International Medical Congress. Colombo 24-27 July 2019

(13) “In-vitro cytotoxicity of hump-nosed pit viper (genus: Hypnale) venoms in mouse fibroblast cell line L 929” Presented at the

   National Research Symposium 2019, Ministry of Health, Nutrition and Indigenous Medicine, Sri Lanka.  22 and 23 October 2019

(14) “Thrombotic microangiopathy and hemolytic uremic syndrome following hump-nosed pit viper (genus: Hypnale) bites” presented at Peradeniya University International Research Sessions (iPURSE), 11 and 12 September 2019

(15) “Clinico-epidemiology of Hypnale zara (hump-nosed viper) envenoming in Sri Lanka” Presented at the

   Sri Lanka Medical Association 133^rd Anniversary International Medical Congress. Colombo 24-26 July 2020

(16) “Clinico-epidemiology of drug overdose in a tertiary care hospital in Sri Lanka” Presented at the

   Sri Lanka Medical Association 133^rd Anniversary International Medical Congress. Colombo 24-26 July 2020

(17) “Clinico-epidemiology of washing powder (‘Prinso’) poisoning” Presented at the

  Sri Lanka Medical Association 133^rd Anniversary International Medical Congress. Colombo 24-26 July 2020

(18) "Clinico-epidemiology of hump-nosed pit viper (genus: Hypnale) envenoming in children" Presented at the

Sri Lanka Medical Association  134^th Anniversary International Medical Congress. Colombo 21-24 September 2021

(19) "Venom induced thrombotic microangiopathy following hump-nosed pit viper (genus: Hypnale) envenoming: effectiveness of therapeutic plasma exchange" Presented at the 

Sri Lanka Medical Association 134^th Anniversary International Medical Congress. 21-24 September, 2021

(20) "Systemic manifestations and long-term effects of hump-nosed pit viper (hypnale spp.) envenoming in Sri Lanka: need of efficacious antivenom" Presented at the 

8^th International Conference of Sabaragamuwa University of Sri Lanka (ICSUSL) 1^st - 3^rd December 2021

(21) “Chronic kidney disease following hump-nosed pit viper (genus: Hypnale) bites” presented at the

Sri Lanka Medical Association 135^th Anniversary International Medical Congress. Colombo 28-30 September and October 01 2022

(22) “Clinico-epidemiology of Hypnale nepa (Hump-nosed pit viper) bites in Sri Lanka” presented at the

Sri Lanka Medical Association 135^th Anniversary International Medical Congress. Colombo 28-30 September and October 01 2022

(23) “Clinico-epidemiology of ‘Hondala’ (Adenia hondala) poisoning” presented at the

Annual academic session 2022-Ratnapura Clinical Society. Ratnapura 26-27 October 2022.

(24) “Cardiotoxic effects following hump-nosed pit viper (Hypnale spp.) bites” presented at the

Sri Lanka Medical Association 136^th Anniversary International Medical Congress. 25-28 July, 2023; BMICH Colombo, Sri Lanka.

(25) “Postmortem findings of hump-nosed pit viper (Hypnale spp.) bites” presented at the

Sri Lanka Medical Association 136^th Anniversary International Medical Congress. 25-28 July, 2023; BMICH Colombo, Sri Lanka.

(26) “Epidemiological and clinical features of snakebites in children” presented at the

Sri Lanka Medical Association 136^th Anniversary International Medical Congress. 25-28 July, 2023; BMICH Colombo, Sri Lanka.

(27) “Ratnapura snakebite cohort: One year experience” presented at the

Sri Lanka Medical Association 137^th Anniversary International Medical Congress. 16-18 August, 2024; Galadari Hotel Colombo, Sri Lanka.

(28) “Clinico-epidemiology of tarantula (Poecilotheria spp.) bites in Sri Lanka” presented at the

Sri Lanka Medical Association 137th Anniversary International Medical Congress. 16-18 August, 2024; Galadari Hotel Colombo, Sri Lanka.

(29) “Paediatric snakebites in Ratnapura District” presented at the

Annual academic session 2024- Ratnapura Clinical Society. Ratnapura 28^th August 2024.

(30) “Clinico-epidemiology of brake fluid poisoning” presented at the

Peradeniya University International Research Sessions (iPURSE), 29-30^th August 2024

(31) “Epidemiological and clinical features of centipede (Scolopendra spp.) bites: A single-center study”  presented at the

Annual Research Symposium 2024, Postgraduate Institute of Medicine, University of Colombo, Sri Lanka, 25^th October 2024.

Chapter "Plant poisoning in Sri Lanka" in

Tropical Medicine with special reference to Sri Lanka

published by Centre for research in Tropical Medicine, Faculty of Medicine, University of Peradeniya.

• "Kumaradasa Rajasuriya Prize for the best paper in Tropical Medicine" at the SLMA 133^rd Anniversary International Medical Congress 2020
• "H.K.T. Fernando Award for the best paper" at the SLMA 134^th Anniversary International Medical Congress 2021
• "Award for the Best Researcher (Senior)-2021", Sabaragamuwa University of Sri Lanka

• “S Ramachandran Prize for the best paper in Nephrology” at the SLMA 135th Anniversary International Medical Congress 2022

• Award for the Best Researcher in the Faculty-2022, Faculty of Medicine, Sabaragamuwa University of Sri Lanka

• Award for the Best Researcher in the Faculty-2023, Faculty of Medicine, Sabaragamuwa University of Sri Lanka

Reviewer (peer-reviewed journals)

Toxicon

Wilderness & Environmental medicine

BMJ Case Reports

American Journal of Case Reports

Tropical Doctor

SAGE Open Medical Case Reports

Journal of Venomous Animals and Toxins including Tropical Diseases (JVATITD)

Ceylon Journal of Science

Clinical Toxicology

PLOS Neglected Tropical Diseases

Scientific Reports

Renal Failure

SN Comprehensive Clinical Medicine

BMC Research Notes

BMC Public Health

'Mother is a song of the universe'

A sinhala book of verses ('Amma vishwaye geetayaki')