Diabetes (Mellitus) is a condition of disordered metabolism caused by an alteration of sugar metabolism.  Broadly speaking there are two types of diabetes which are either due to a diminished production of insulin (Type 1) or resistance to its effects (Type 2 or maturity onset). Type 2 Diabetes is also associated with gestational diabetes of pregnancy. Both types are usually due to a combination of hereditary and environmental causes.

People with Diabetes experience abnormalities in their blood sugar levels which are normally controlled by a complex interaction between multiple chemicals and hormones in the body, most importantly the hormone insulin which is made in the pancreas. Untreated, Diabetes  leads to high blood glucose levels which  in turn can damage nerves, blood vessels, kidneys and eyes. 

Uncontrolled high blood sugar causes the acute signs of diabetes (excessive urine production, compensatory thirst and increased fluid intake, blurred vision, unexplained weight loss, lethargy, and changes in energy metabolism).

Diabetes has been treatable since insulin became medically available in 1921, but there is no cure. Insulin injections remain the basic treatment of type 1 diabetes. Type 2 diabetes tends to be managed using a combination of dietary treatment, exercise, medications and insulin supplementation.

Adequate treatment of diabetes, increased awareness of blood pressure control and lifestyle factors (such as not smoking and maintaining a healthy body weight), significantly improves the risk profile of most of the chronic complications.

All of our General Practitioners and our Paediatric team are able to support patients with Diabetes.  Our Specialist Diabetic Nurse Sr Julie Parker provides regular clinics and support for patients with type 1 and type 2 diabetes

Our Diabetic Service team provides:

  • Baseline assessment of disease status and current medications
  • Dietary and lifestyle planning and monitoring
  • Regular insulin and glycaemic control monitoring and treatment
  • Eye and renal checks
  • Management of disease complications

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Your Specialists

I'm still learning"

Dr Patrick Nerney

General Practitioner/ Family Medicine/ Occupational Health

Areas of expertise

General Practice Occupational Medicine Travel Medicine

Education and professional training

Cardiff University Manchester University Liverpool School of Tropical Medicine

Professional Qualifications, Associations & Accomplishments

GMC and GMRB registered

Professional experience

GP 45 years Occupational medicine 10 Years

Languages spoken

English and Spanish


Squash/ Sailing/ Wine making/ Lifestyle Medicine

Dr Isabella Bassill MA(Oxon) MBChB FRCP (Acute)

General Internal Physician

Areas of expertise

Consultant in Acute and General Internal Medicine. Interests in complex patients, breathlessness, fainting, chest pains, fatigue, long Covid.

Education and professional training

University Of Birmingham. University of Oxford.

Professional Qualifications, Associations & Accomplishments

Completed consultant specialist training in 2015 in Acute and General Internal Medicine. Member of the Royal College of Physicians (London), Society for Acute Medicine and the European Respiratory Society.

Professional experience

After completing my medical degree, I continued with various medical training in West and East Midlands before taking a Consultant Physician post at the Royal Derby Hospital in 2015. In 2020 I moved to Gibraltar and worked as a General Physician at St. Bernard's Hospital for 18 months before joining Specialist Medical Clinic.

Languages spoken



Before studying Medicine I completed a Masters degree in English Language and Literature at the University of Oxford. Reading is my main leisure activity.