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Medicines alprostadilQuestion & answer

alprostadil · Medicine question

What should I do if an erection lasts four hours?

iatroX medicinesMedicine guide reviewed 18 August 2026

The answer

Answer

Seek emergency medical assessment immediately; delaying treatment can permanently damage erectile tissue.

Sources for this answer

Alprostadil 10 micrograms powder for solution for injection — Current selected SmPCemc · Summary of Product Characteristics
Vitaros 3 mg/g cream — Current selected SmPCemc · Summary of Product Characteristics
Viridal Duo 40 micrograms/ml Powder and Solvent for Solution for Injection. — Current selected SmPC

emc · Summary of Product Characteristics

Caverject Dual Chamber 10 micrograms — Current selected SmPCemc · Summary of Product Characteristics

General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.

The full medicine guide

alprostadil

Read the wider context, including uses, precautions and the sources behind this medicine guide.

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