Alprostadil
Recommended Dosage
Common wellness/research protocol (Intracavernosal Injection): Start with 2.5–5 mcg injected directly into the corpus cavernosum. Titrate upward in 2.5–5 mcg increments as needed. Most men respond well to 5–20 mcg per use. Do not exceed 40–60 mcg in a single dose.
Other reported ranges:
Standard effective dose: 10–20 mcg per injection
Maximum recommended single dose: 60 mcg (rarely needed)
Frequency: No more than 3 times per week, with at least 24 hours between doses.
Topical Cream (if using compounded formulation): 0.2–0.4% cream applied to the tip of the penis (meatus) approximately 30 minutes before activity. Typical starting amount is a pea-sized amount (≈100–200 mg of cream).
Administration Notes:
Use a fine insulin syringe (30–31 gauge) for injection.
Rotate injection sites (left/right side of penis).
Erection usually begins within 5–15 minutes and lasts 30–60 minutes depending on dose.
Always start low and titrate slowly to find the lowest effective dose.
Dosing is highly individualized based on response, tolerance, and underlying cause of ED—consult a qualified healthcare provider experienced with alprostadil for personalized guidance and proper training on injection technique. This is for informational purposes only.
Key Potential Benefits of Alprostadil
Effective Treatment of Erectile Dysfunction (ED) with High Response Rates
Directly relaxes smooth muscle in the corpus cavernosum and dilates cavernosal arteries, rapidly increasing blood flow into the penis to produce firm, sustainable erections suitable for sexual intercourse.
Achieves success rates of approximately 70–85% in producing erections firm enough for intercourse, including in men who do not respond adequately to oral PDE5 inhibitors.
Works independently of sexual stimulation in many cases due to its local mechanism, providing reliable on-demand efficacy across various forms (injection, suppository, or topical).
Rapid Onset and Reliable Mechanism for Penile Blood Flow
Elevates intracellular cyclic AMP (cAMP) levels, leading to smooth muscle relaxation and vasodilation that traps blood within the penile tissues via the veno-occlusive mechanism.
Onset of action is typically within 5–20 minutes for injectable forms and slightly longer for topical or urethral applications, supporting spontaneous or planned sexual activity.
Serves as an effective second-line or alternative therapy for men with vascular, neurogenic, or mixed causes of ED, including those on medications that contraindicate oral treatments.
Utility in Diagnosis of Underlying ED Causes
Used in clinical testing (e.g., combined with other assessments) to help differentiate vascular from non-vascular causes of erectile dysfunction by evaluating the penile response to direct vasodilation.
Provides objective data on penile blood flow capacity and smooth muscle function, aiding in accurate diagnosis and personalized treatment planning.
Support for Patients with Contraindications to Oral Therapies
Offers a viable option for individuals who cannot tolerate, do not respond to, or have contraindications for PDE5 inhibitors (such as those on nitrates, alpha-blockers, or with certain cardiovascular conditions).
Topical cream formulations demonstrate improvements in International Index of Erectile Function (IIEF) scores (up to 13-point increases in some studies) while allowing compatibility with concurrent antihypertensive or other systemic therapies.
Potential Broader Vasodilatory and Anti-Aggregatory Effects
Inhibits platelet aggregation and promotes general vasodilation, which may contribute to improved local circulation and reduced vascular resistance in the penile tissues.
In specific neonatal applications, maintains patency of the ductus arteriosus in congenital heart defects, ensuring adequate blood flow and oxygenation until surgical correction (a well-established pediatric use).
Additional Advantages in Treatment Flexibility and Outcomes
Provides dose-dependent improvements in erectile function across multiple delivery methods, allowing tailoring to individual needs and preferences.
Supports sexual confidence, relationship satisfaction, and overall quality of life in men with ED by enabling consistent performance when other options fall short.
Demonstrates efficacy in long-term self-administration protocols with high rates of successful intercourse (up to 94% in some follow-up data).
