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Laboratory testing is needed for some men. Tests such as these may be performed:

• Your hormonal status for testosterone (the male hormone) is evaluated, particularly if one of your symptoms is low sexual desire (low libido).
  
  
  • Blood tests for testosterone should ideally be taken early in the morning because that is when levels are usually at their highest.
    
    
  • Blood may also be tested for other hormones that can affect sexual function (eg, luteinizing hormone, prolactin).
  
  
• Your blood may be checked for glucose (sugar), cholesterol, thyroid function, triglycerides, and prostate specific antigen (PSA).
  
  
• A urinalysis looking for blood cells, protein, and glucose (sugar) may also be done.
  
  

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