• skin care
  • altitude sickness .
    • hormonal conditions such as a change in your hormone levels, for example, as a result of an overactive thyroid, an underactive thyroid, cushings syndrome or hypogonadism can all result in impotence.
    • have been told not to have sex, not to engage in sexual activity /actions that widen your blood vessels;
    • have low blood pressure (hypotension);
    • have had a stroke lately;
    • have unstable angina;
    • have had a heart attack; or
    • have a history of non-arteritic anterior ischaemic optic neuropathy (this condition causes a sudden loss of vision).

    side effects of pde-5 inhibitors include: