• Forensic mental health

• Psychiatry and law

• Sexual health and psychiatry

• Raghavan Kulanayagam Gold Medal for the Best Essay by a Psychiatry Trainee, awarded by the Sri Lanka College of Psychiatrists, 2024

• Bobby Somasundaram Gold Medal for the Most Outstanding Performance at the Selection Examination for MD Psychiatry, 2022

• Best oral presentation (2^nd place) at the 23^rd Annual Academic sessions of the Menopause Society of Sri Lanka in 2024 for study titled ‘Prevalence of menopausal symptoms and its association with depression, cognitive functions and sociodemographic factors of middle-aged females attending a tertiary care hospital in Sri Lanka’.

• Best oral presentation (2^nd place) at 20^th Annual academic sessions of Sri Lanka College of Psychiatrists, Colombo 2023 for the study titled ‘Internalized homonegativity, self-esteem and depression among individuals who identify as gay, lesbian and bisexual in Sri Lanka’

• D.S. Senanayake Challenge trophy for the most outstanding student of the biological science stream at D.S. Senanayake College, Colombo 2012.

• Manchanayake LD, Akmeemana LDD, Akmeemana SP, Gunathilake IAGMP, Senevirathna CMCA, Cooray MRS, Akmeemana NS, Rifthie D, Jahan NJ. ‘Prevalence of menopausal symptoms and its association with depression, cognitive functions and sociodemographic factors of middle-aged females attending a tertiary care hospital in Sri Lanka’^. 23^rd Annual Academic sessions of the Menopause Society of Sri Lanka 2024.

• Manchanayake LD, Akmeemana LDD, Akmeemana SP, Gunathilake IAGMP, Senevirathna CMCA, Cooray MRS, Akmeemana NS, Rifthie D, Jahan NJ. ‘Prevalence of menopausal symptoms and its association with depression, cognitive functions and sociodemographic factors of middle-aged females attending a tertiary care hospital in Sri Lanka – Preliminary findings’^. 15^th SAARC International Psychiatry Conference and Annual academic sessions of Sri Lanka College of Psychiatrists, 2024.

• Dilruwan Manchanayake, Janithe C. Herath, Chittahari Abhayanayaka. ‘License to kill’ Spousal homicide; a forensic psychiatry perspective’. 15^th SAARC International Psychiatry Conference and Annual academic sessions of Sri Lanka College of Psychiatrists, 2024

• Dilruwan Manchanayake, Prabha Vidyatilake, Miyuru Chandradasa. ‘The cry inside: grief masked by attention deficit hyperactivity disorder in children’.15^th SAARC International Psychiatry Conference and Annual academic sessions of Sri Lanka College of Psychiatrists, 2024

• Manchanayake LD, Senevirathna CMCA, Gunathilaka IAGMP, Akmeemana LDD^. ‘Audit of Antipsychotic Prescription in Dementia Patients at Ministry Psychiatry Unit, Colombo South Teaching Hospital (CSTH)’. Post Graduate Institute of Medicine- Annual Research symposium 2023.

• Manchanayake LD, Baminiwatta AKAB, Delpachithra ML, Wijesinghe CA. ‘Validation of the Sinhala version of internalized homonegativity scale in males who identify as gay and bisexual in Sri Lanka’ 136th SLMA International medical congress 2023.

• Manchanayake LD, Baminiwatta AKAB, Delpachithra ML, Wijesinghe CA. ‘Internalized homonegativity, self-esteem and depression among individuals who identify as gay, lesbian and bisexual in Sri Lanka’. Annual academic sessions of Sri Lanka College of Psychiatrists, 2023

Contributions in other institutes

Appointed medical officer for the Council of Baptist Churches of Sri Lanka.

Advisor to the Counselling hub of the National committee of Sri Lanka Baptist Young Peoples’Auxilliary.

• Conducting lectures in the Psychiatry module for speech and occupational therapy students.

• Conducting tutorials for the final year medical students.

• Clinical teaching in psychiatry for the final year medical students.

Clinical service:

• Providing services as a Registrar in the University Psychiatry Unit, Colombo North Teaching Hospital.

• Guest lecture on Occupational stress management and good mental health among executives in the cooperate sector organized by Zion Consultancy at Galadari Hotel, Colombo 2023

• Guest speaker at the National youth conference of Baptist Young Peoples’Auxiliiary in 2023 and National Leaders Conference of Baptist Young Peoples’Auxiliiary of Sri Lanka in 2024. ‘Psychosocial problems in the youth and mental health’.

• Session on Substance abuse prevention and mental health among warehouse junior staff at John Keells, Logistics (Pvt) Ltd, Ja-Ela 2023