Dr Ravi Philip Rajkumar
About Me: 
Consultant in-charge, Marital and Psychosexual Clinic Consultant in-charge, Memory Clinic
Medical Registration number: 
TNMC 72163
OPD Timing: 
Tuesday & Saturday – 9:00 am to 1:00 pm
Academic Qualifications: 
  • M.B.B.S
  • M.D. (Psychiatry)
Special Area of Interest: 
Psychopharmacology,Comorbidities in psychiatry,Psychoimmunology,Psychogenic sexual dysfunction , Environmental risk factors in psychiatry
  1. Fusar-Poli P, Salazar de Pablo G, Rajkumar RP, López-Díaz Á, Malhotra S, Heckers S, Lawrie SM, Pillmann F. Diagnosis, prognosis, and treatment of brief psychotic episodes: a review and research agenda. Lancet Psychiatry. 2022 Jan;9(1):72-83. doi: 10.1016/S2215-0366(21)00121-8. Epub 2021 Nov 29. PMID: 34856200.
  2. Rajkumar RP. Physician-Assisted Suicide in Dementia: Paradoxes, Pitfalls and the Need for Prudence. Front Sociol. 2021 Dec 22;6:815233. doi: 10.3389/fsoc.2021.815233. PMID: 35004941; PMCID: PMC8727695.
  3. Rajkumar RP. The Relationship Between Pre-pandemic Measures of Religiosity and Psychological Responses to the COVID-19 Pandemic: A Secondary Analysis of Data From a Multi-Country Study. Cureus. 2021 Nov 29;13(11):e20013. doi: 10.7759/cureus.20013. PMID: 34873550; PMCID: PMC8631488.
  4. Rajkumar RP. Is There a Relationship Between ADHD and COVID-19 Prevalence and Mortality Indices? An Analysis of Data From 156 Countries. J Atten Disord. 2021 Nov 16:10870547211056894. doi: 10.1177/10870547211056894. Epub ahead of print. PMID: 34784830.
  5. Calderón-Garcidueñas L, Stommel EW, Rajkumar RP, Mukherjee PS, Ayala A. Particulate Air Pollution and Risk of Neuropsychiatric Outcomes. What We Breathe, Swallow, and Put on Our Skin Matters. Int J Environ Res Public Health. 2021 Nov 3;18(21):11568. doi: 10.3390/ijerph182111568. PMID: 34770082; PMCID: PMC8583112.
  6. Rajkumar RP. The relationship between measures of individualism and collectivism and the impact of COVID-19 across nations. Public Health Pract (Oxf). 2021 Nov;2:100143. doi: 10.1016/j.puhip.2021.100143. Epub 2021 May 17. PMID: 34494009; PMCID: PMC8411834.
  7. Rajkumar RP. What Are the Correlates of Global Variations in the Prevalence of Opioid Use Disorders? An Analysis of Data From the Global Burden of Disease Study, 2019. Cureus. 2021 Oct 13;13(10):e18758. doi: 10.7759/cureus.18758. PMID: 34659934; PMCID: PMC8514710.
  8. Selvakumar N, Subramanian K, Balasubramanian S, Rajkumar RP. Diagnostic and Therapeutic Challenges due to Psychosis and Catatonia in Non-syndromic Retinitis Pigmentosa: A Case Report. Indian J Psychol Med. 2021 Sep;43(5):458-459. doi: 10.1177/0253717620946457. Epub 2020 Sep 14. PMID: 34584317; PMCID: PMC8450741.
  9. Faraone SV, Banaschewski T, Coghill D, Zheng Y, Biederman J, Bellgrove MA, Newcorn JH, Gignac M, Al Saud NM, Manor I, Rohde LA, Yang L, Cortese S, Almagor D, Stein MA, Albatti TH, Aljoudi HF, Alqahtani MMJ, Asherson P, Atwoli L, Bölte S, Buitelaar JK, Crunelle CL, Daley D, Dalsgaard S, Döpfner M, Espinet S, Fitzgerald M, Franke B, Gerlach M, Haavik J, Hartman CA, Hartung CM, Hinshaw SP, Hoekstra PJ, Hollis C, Kollins SH, Sandra Kooij JJ, Kuntsi J, Larsson H, Li T, Liu J, Merzon E, Mattingly G, Mattos P, McCarthy S, Mikami AY, Molina BSG, Nigg JT, Purper-Ouakil D, Omigbodun OO, Polanczyk GV, Pollak Y, Poulton AS, Rajkumar RP, Reding A, Reif A, Rubia K, Rucklidge J, Romanos M, Ramos-Quiroga JA, Schellekens A, Scheres A, Schoeman R, Schweitzer JB, Shah H, Solanto MV, Sonuga- Barke E, Soutullo C, Steinhausen HC, Swanson JM, Thapar A, Tripp G, van de Glind G, Brink WVD, Van der Oord S, Venter A, Vitiello B, Walitza S, Wang Y. The World Federation of ADHD International Consensus Statement: 208 Evidence-based conclusions about the disorder. Neurosci Biobehav Rev. 2021 Sep;128:789-818. doi: 10.1016/j.neubiorev.2021.01.022. Epub 2021 Feb 4. PMID: 33549739; PMCID: PMC8328933.
  10. Rajkumar RP. Gut Hormones as Potential Therapeutic Targets or Biomarkers of Response in Depression: The Case of Motilin. Life (Basel). 2021 Aug 29;11(9):892. doi: 10.3390/life11090892. PMID: 34575041; PMCID: PMC8465535.
  11. Rajkumar RP. The Relationship Between Four Measures of Religiosity and Cross-National Variations in the Burden of Dementia. Cureus. 2021 Aug 9;13(8):e17034. doi: 10.7759/cureus.17034. PMID: 34395146; PMCID: PMC8357016.
  12. Calderón-Garcidueñas L, Rajkumar RP, Stommel EW, Kulesza R, Mansour Y, Rico- Villanueva A, Flores-Vázquez JO, Brito-Aguilar R, Ramírez-Sánchez S, García- Alonso G, Chávez-Franco DA, Luévano-Castro SC, García-Rojas E, Revueltas-Ficachi P, Villarreal-Ríos R, Mukherjee PS. Brainstem Quadruple Aberrant Hyperphosphorylated Tau, Beta-Amyloid, Alpha-Synuclein and TDP-43 Pathology, Stress and Sleep Behavior Disorders. Int J Environ Res Public Health. 2021 Jun 22;18(13):6689. doi: 10.3390/ijerph18136689. PMID: 34206224; PMCID: PMC8297352.
  13. Rajkumar RP. Does Culture Influence Antidepressant Response? A Preliminary Investigation of Randomized Controlled Trials of Fluoxetine. Cureus. 2021 May 17;13(5):e15079. doi: 10.7759/cureus.15079. PMID: 34017669; PMCID: PMC8129591.
  14. Rajkumar RP. Cross-National Variations in COVID-19 Mortality: The Role of Diet, Obesity and Depression. Diseases. 2021 May 6;9(2):36. doi: 10.3390/diseases9020036. PMID: 34066585; PMCID: PMC8161818.
  15. Rajkumar RP. Suffering and Salutogenesis: A Conceptual Analysis of Lessons for Psychiatry From Existential Positive Psychology (PP2.0) in the Setting of the COVID-19 Pandemic. Front Psychol. 2021 Apr 9;12:646334. doi: 10.3389/fpsyg.2021.646334. PMID: 33897551; PMCID: PMC8064119.
  16. Rajkumar RP. Harnessing the Neurobiology of Resilience to Protect the Mental Well-Being of Healthcare Workers During the COVID-19 Pandemic. Front Psychol. 2021 Mar 18;12:621853. doi: 10.3389/fpsyg.2021.621853. PMID: 33815205; PMCID: PMC8012770.
  17. Ramesh R, Sundaresh A, Rajkumar RP, Negi VS, Vijayalakshmi MA, Krishnamoorthy R, Tamouza R, Leboyer M, Kamalanathan AS. DNA hydrolysing IgG catalytic antibodies: an emerging link between psychoses and autoimmunity. NPJ Schizophr. 2021 Feb 26;7(1):13. doi: 10.1038/s41537-021-00143-6. PMID: 33637732; PMCID: PMC7910540.
  18. Rajkumar RP. A Biopsychosocial Approach to Understanding Panic Buying: Integrating Neurobiological, Attachment-Based, and Social-Anthropological Perspectives. Front Psychiatry. 2021 Feb 24;12:652353. doi: 10.3389/fpsyt.2021.652353. PMID: 33716838; PMCID: PMC7943846.
  19. Rajkumar RP. Sleep, physical activity and mental health during the COVID-19 pandemic: complexities and opportunities for intervention. Sleep Med. 2021 Jan;77:307-308. doi: 10.1016/j.sleep.2020.10.004. Epub 2020 Oct 10. PMID: 33594979; PMCID: PMC7547309.
  20. Rajkumar RP. The Relationship Between Demographic, Socioeconomic, and Health-Related Parameters and the Impact of COVID-19 on 24 Regions in India: Exploratory Cross-Sectional Study. JMIR Public Health Surveill. 2020 Nov 27;6(4):e23083. doi: 10.2196/23083. PMID: 33147164; PMCID: PMC7717919.

For a complete list of publications, see here:

Special Clinics: 
  1. Marital and Psychosexual Clinic
  2. Memory and Neuropsychiatry Clinic
  3. Psychodermatology Clinic