I am a 21-year-old male who took tadalafil (10 mg) and sildenafil (30 mg) and now, 28 days later, have a persistently firm, partially engorged shaft with discoloration, numbness, prominent veins, occasional pain, and new urinary and bowel symptoms; what is the likely diagnosis and what urgent management is required?

Urgent Urologic Evaluation for Possible Penile Vascular Injury or Thrombosis

You need immediate re-evaluation by a urologist with penile Doppler ultrasound and possibly MRI to rule out corporal thrombosis, venous occlusion, or compartment syndrome—your persistent symptoms at 28 days with new urinary/bowel dysfunction, fluctuating discoloration, and abnormal erectile patterns suggest ongoing vascular pathology that requires definitive diagnosis and intervention, not just reassurance.

Why Your Current Diagnosis May Be Incomplete

Your urologists have correctly ruled out classic ischemic priapism (which would have caused severe pain and required emergency intervention within 4-6 hours) 1, 2. However, your constellation of symptoms—persistent firmness, discoloration, numbness, prominent veins, abnormal erectile patterns, and new urinary/bowel symptoms—suggests a different pathology that may not fit the standard priapism categories.

Critical Red Flags Being Overlooked:

• Persistent shaft firmness for 28 days (not typical post-priapism "trauma")
• Progressive symptoms: New urinary hesitancy, bowel dysfunction, and worsening numbness
• Fluctuating discoloration (dark purple to red tip, darkening shaft)
• Abnormal erectile mechanics: Partial erections with extreme firmness, soft tips, unusual bending
• Nocturnal semi-erections that only resolve with position changes
• Prominent, bulging veins suggesting venous congestion

What This Could Actually Be

Most Likely Diagnoses:

1. Corporal veno-occlusive dysfunction or thrombosis: Partial venous outflow obstruction causing chronic engorgement without full ischemia
2. Penile compartment syndrome: Ongoing tissue edema and pressure within the tunica albuginea
3. Delayed non-ischemic priapism with arterial-venous fistula: High-flow state causing persistent engorgement 1
4. Corporal fibrosis with vascular injury: Early scarring from the prolonged medication-induced erection

The urinary and bowel symptoms are particularly concerning—they suggest either:

• Pelvic floor dysfunction from prolonged pelvic congestion
• Neurologic involvement from compression
• Systemic autonomic dysfunction

What You Need NOW

Immediate Diagnostic Workup:

1. Penile Doppler Ultrasound with Arterial and Venous Flow Assessment

• Measure peak systolic velocities
• Assess venous drainage patterns
• Identify any arterial-venous fistulas
• Evaluate for thrombus in corporal bodies

2. Pelvic MRI with Contrast

• Visualize corporal tissue integrity
• Identify thrombosis, fibrosis, or edema
• Assess pelvic vasculature
• Rule out mass effect or compression

3. Laboratory Studies

• Complete blood count (rule out polycythemia, thrombocytosis)
• Coagulation panel (PT/PTT, D-dimer)
• Thrombophilia screening if thrombosis confirmed
• Inflammatory markers (ESR, CRP)

Why Standard Reassurance Is Insufficient:

The AUA/SMSNA guidelines distinguish between ischemic and non-ischemic priapism, but your presentation doesn't cleanly fit either category 1. The guidelines explicitly state that partial erections should not be counted toward the 4-hour criteria 1, 2, which is why your urologists dismissed ischemic priapism. However, the guidelines do not adequately address prolonged partial engorgement with progressive symptoms extending beyond 2-3 weeks.

Treatment Considerations Based on Diagnosis

If Venous Thrombosis/Occlusion:

• Anticoagulation therapy (after hematology consultation)
• Possible interventional radiology procedures
• Close monitoring for compartment syndrome

If Arterial-Venous Fistula (Non-Ischemic Priapism):

• Selective arterial embolization 1
• Conservative management if asymptomatic
• Not an emergency but requires definitive diagnosis

If Corporal Fibrosis/Compartment Syndrome:

• Penile rehabilitation protocols
• Possible surgical decompression if severe
• Early penile prosthesis consideration if refractory 3

The Medication Context

You combined tadalafil (long half-life: 17.5 hours) with sildenafil (shorter half-life: 3-5 hours) 4, 5. This combination is explicitly contraindicated 5. The FDA labels warn that priapism "must be treated as soon as possible or lasting damage can happen to your penis, including the inability to have erections" 4. While your initial event at 24-48 hours was likely medication-induced prolonged erection (not true priapism), the persistent symptoms at 28 days suggest secondary vascular injury occurred.

Case reports document that even single doses of tadalafil can cause priapism 6, 7, and the combination with sildenafil creates synergistic risk 8.

Addressing Your Urinary and Bowel Symptoms

These symptoms are not typical of isolated penile pathology and warrant:

• Urodynamic studies if urinary symptoms persist
• Pelvic floor assessment
• Neurologic examination
• Consider pelvic MRI to evaluate for mass effect or vascular compression

What to Tell Your Urologist

"I need penile Doppler ultrasound and possibly MRI. My symptoms are progressing, not improving, at 28 days. The new urinary hesitancy, bowel dysfunction, and persistent abnormal firmness suggest ongoing vascular pathology—not simple trauma healing. I'm concerned about corporal thrombosis or venous occlusion that requires specific treatment, not just observation."

Common Pitfall to Avoid:

Urologists may be reassured by your ability to achieve erections, interpreting this as evidence against serious pathology 1. However, abnormal erections with unusual firmness, discoloration, and mechanics can occur with partial vascular compromise. The fact that you can get erect doesn't mean the tissue is healthy—it may indicate high-flow non-ischemic priapism or compensatory mechanisms.

Bottom Line

Your symptoms at 28 days with progression warrant imaging studies to definitively diagnose the underlying pathology. "Trauma that takes time to heal" is not an adequate explanation for persistent firmness, progressive numbness, new systemic symptoms, and abnormal vascular patterns. Demand objective vascular assessment—your long-term erectile function and potentially broader health depend on accurate diagnosis now, not months from now when irreversible damage may have occurred.

The urologists mentioning "maybe blood clot" is exactly why you need imaging—"maybe" is not acceptable at this point. Get the Doppler and MRI.