Question 1: Most common cause of erectile dysfunction in men under 40:
- A. Vascular
- B. Drug induced (Correct Answer)
- C. Diabetes
- D. Psychological
Explanation: ***Drug induced***
- In men under 40, **medication side effects** are a significant and often overlooked cause of erectile dysfunction [4].
- Common culprits include **antidepressants** (especially SSRIs), **antihypertensives** (like beta-blockers and thiazide diuretics), and some **antihistamines** [2].
*Vascular*
- While vascular issues are the **most common cause overall** in older men, they are less prevalent in younger men unless associated with severe underlying conditions like **uncontrolled hypertension** or **dyslipidemia** [2].
- **Atherosclerosis** and reduced blood flow to the penis are the primary mechanisms, which typically manifest later in life [2].
*Diabetes*
- **Diabetes** can cause erectile dysfunction through **peripheral neuropathy** and **vascular damage**, leading to impaired nerve function and blood flow [3].
- Although it can occur at any age, its prevalence as a cause of ED generally **increases with the duration and poor control** of the disease, making it less likely to be the *most common* cause in men under 40.
*Psychological*
- **Psychological factors** such as stress, anxiety, depression, and relationship problems are **very common** contributors to erectile dysfunction in young men [1].
- However, direct **drug-induced ED** is often a primary or exacerbating factor that should be carefully considered, especially given the widespread use of various medications in this age group [2].