Table 6 Possible causes of ED and Routine Investigations in Primary Care

1. Diabetes mellitus

2. Atherosclerosis and ischaemic heart disease

3. Endocrine, cardiology or neurological referral may be indicated

4. Prostate cancer

5. Hypogonadism and hypopituitarism

6. Prolactinoma

7. Multiple sclerosis

8. Parkinson’s disease

9. Alcoholism

10. Obesity

11.Medication related

12. Smoking

13. Other neurological disease

14. Stress

15. Depression

16. Psychological

1. Blood tests

 Full blood count

 Urea and electrolytes

 Lipids

2. Liver function tests

3. Glycated haemoglobin (HbA1c)

4. Prostate-specific antigen test

5. Prolactin

6. Testosterone