About us

Pain Medicine Sydney is a specialty pain management clinic with private rooms at the Prince of Wales Private Hospital in Randwick, and the Royal Prince Alfred Hospital.

We provide a multi-disciplinary approach to pain management which incorporates a combination of medical and holistic treatments.
Read more about our team below, or contact us to book an appointment.

Dr Charlotte S.H. Johnstone

Pain Specialist



Dr Charlotte S.H. Johnstone (MBChB, FANZCA, FPMANZCA) is the Principal Director of Pain Medicine Sydney. She is a pain medicine specialist and anaesthetist with 12 years of experience managing pain.

Dr Johnstone is a Senior Staff Specialist in Anaesthesia and Pain Medicine at the Royal Prince Alfred Hospital. She is also an Examiner and Supervisor of Training at the Faculty of Pain Medicine Australia and New Zealand College of Anaesthetist (FPMANZCA), and is a Member of the FPMANZCA curriculum redesign committee. Dr Johnstone is a Conjoint Senior Lecturer at the University of New South Wales.

Dr Johnstone is highly skilled in most pain management procedures and she has an extra fellowship from the Faculty of Interventional Pain Practitioners.

Some of Dr Johnstone’s publications include:

  • The use of SMS technology for estimation of postoperative pain after tonsillectomy. 2012
  • The use of the laryngeal mask for ear, nose and throat surgery- Published in “The Larynx” May 2011
  • Audit of the effects of inrathecal morphine for total knee joint replacement surgery. 2009
  • Occipital Neuralgia. Treatment with occipital stimulation. 8 case studies. “Neuromodulation” 2006.
  • Spinal cord stimulation: a seven-year audit. Journal of Clinical Neuroscience 2005 12(3), 264-270.
  • Pilot Study, Department of Oncology, Prince of Wales Hospital, Hong Kong. Hyperprolactinaemia in the evaluation of Hypothalamic Hypopituitism following radiation therapy for Nasopharyngeal Carcinoma
  • 15 year surgical audit of treatment and outcomes of Haemorrhoids in the Department of Surgery, Wellington Hospital. Published in Australian New Zealand, Journal of Surgery 1992.

Dr Johnstone advocates a multidisciplinary approach to chronic pain management and views pain as a whole person issue. She believes managing pain is a dynamic, positive and rewarding process.


Nunzio Mosca



Nunzio is a Clinical Psychologist, originally from the UK, now living and working in Sydney. He has worked in a number of mental health settings in various roles since 2003 and has been a fully qualified Clinical Psychologist since 2008.

He has worked within the public and private sectors and with people in community and inpatient settings. Nunzio is experienced in the assessment and treatment of a broad range of presentations including: chronic pain; anxiety (e.g. social anxiety, generalized anxiety, panic attacks, obsessive compulsive disorder and post-traumatic stress and phobias); depression and bipolar disorder; stress; interpersonal and relationship problems; personality difficulties; trauma; identity issues; low self-esteem, grief and loss, life transitions and adjustments and difficulties with emotions.

Nunzio holds an Honours degree in Sociology with Psychology and a Postgraduate Diploma in Psychology, both from universities in London. He obtained his Doctorate in Clinical Psychology from Exeter University in SouthWest England. He is registered with the Australian Health Practitioner Regulation Agency (AHPRA) and is a member of the Australian Psychological Society.


Claire Grullemans



“Caring, creative, and crystal clear” are some of the words people use when they come to see nutritionist Claire Grullemans.

Claire is passionate about coaching people towards living a healthier life, whether for weight loss, planning a healthy pregnancy, or managing overall wellbeing. Claire treats each and every patient with the same high level of compassion and enthusiasm.

We only have one body, and we live in it every day. Claire believes we should treat it respectfully, give it the rest it needs, feed it the food it needs, love it, and every cell that is part of it, as best as we can.

Claire is an experienced naturopath and nutritionist who has worked in the natural health care industry for the last 10 years.

To be a great practitioner, Claire upholds her standards of practice by attending seminars regularly (with the latest research and development for reproductive sciences, dietary and herbal medicine workshops, detoxification methods, and more). She believes in preventative medicine and coaching her patients about the benefits of natural medicines – as well as a naturopathic whole-foods diet.

There is no case too difficult, no person too big or too small to undergo naturopathic and nutritional consultations with Claire.


Brigitte Seelin



Brigitte graduated from Sydney University with a Masters of Physiotherapy. She has a strong exercise rehab base having previously completed a Bachelor of Exercise Science and Master of Clinical Exercise Physiology from Wollongong University. Her passion is physiotherapy for low back pain treating complex spinal, pelvic and postural related neck and shoulder pain. Throughout her career she has seen how integral a healthy spine can be in the prevention of injury to all other parts of the body. Her approach is to find and treat the dysfunctions in alignment and movement patterns of the body rather than focusing and treating only the painful site.

Brigitte has a strong interest in spinal surgery rehabilitation where she can combine her back pain physiotherapy skills and her clinical pilates skills.

  • B.Sc(Exsc)
  • M(Clin Ex Phys)
  • M(Phty) APAM
  • Clinic Founder and Director
  • Physiotherapist Bondi Junction
  • Clinical Pilates Instructor


Elisha Renton



Elisha is a unique and talented Physiotherapist in that she holds a Masters in both Exercise Physiology and Physiotherapy and has studied Clinical Pilates. Having studied such a broad range of applied science has enabled her to be at the forefront of physiotherapy for back pain, neck pain and headaches. Elisha has completed postgraduate study in both back pain and headache treatment. Along with Brigitte, Elisha has completed study in Clinical Pilates making it possible for all patients to naturally flow on to carefully and properly prescribed back pain exercises. These include exercises for pain relief, spinal decompression exercises and core stability exercises to improve trunk control, which are all essential parts of treating a low back problem.

Elisha has a special interest in nutrition and how this may affect the internal inflammatory climate and the normal repair processes in spinal conditions. Dealing at a deeper nutritional level helps provide an extra dimension in the management of chronic back pain, particularly where they are associated with other metabolic disorders such as irritable bowel syndrome and other digestive disorders.

Both Elisha and Brigitte have a passion for spinal surgery rehabilitation where they use there state of the art clinical pilates studio.

  • B.Sc(Exsc)
  • M(Clin Ex Phys)
  • M(Phty) APAM
  • Clinic Founder and Director
  • Physiotherapist Bondi Junction
  • Clinical Pilates Instructor
  • Watson Headache Level 1 Certified Practitioner