There exists the risk of producing a pharmacological erection that will last for several hours or days. This major complication of the method is unpredictable and does not depend on the drug injected (phenoxibenzamine, first time used, which is more aggressive than phentolamine). The apparition of the erection pharmacologically extended (EFP) until a duration of about four hours, which represents a real non-anoxic priapism, does not depend on the dosage injected either. The smallest dose of injected papaverine, responsible for priapism, was of five milligrams.

This complication does not depend on the schedule and the frequency of the IIC. EFP can be triggered after several hours from the injection, which was even inefficient over the erection or can happen after several auto-injections which previously have been like clockwork. The incidence of the apparition of the EFP on various series of treatment Viagra Canada is appreciated to be between five-ten percent (according to several authors). The EFP’s prophylaxia, even though is not certain, and consists in the following:

• Starting with a small dosage of erectogene substance;
• Not reinjecting immediately the substance in case of failure;
• To avoid using a medicinal association of erectogene substances;
• To supervise for a while the subject after IIC and to inform the patient of the risk of the apparition of the secondary EFP.

The treatment of the erection that is pharmacologically produced, according to P. Bondil, Nauen J. L.. The prudency obliges us to treat any erection that is pharmacologically extended which is painful or before its duration touches four hours (when the priapism is considered non-anoxic). The treatment consists in decompressional puncture, followed by success of failure. In case of failure, at puncture appears either red blood (non-anoxic priapism), either black blood (anoxic priapism). In case of non-anoxic priapism, it is recommended IIC of anti-erectogene substances, such as metaraminol (alpha-stimulant). The metaraminol is usually effective but has a great risk, the one of possibly appearing some hypertensive flares, sometimes deadly. To prevent this risk, some authors recommend using certain erectogene alpha-stimulants, harmless, such as ephedrine or phenilephrine. In case of failure of the intracav-ernous injection with anti-erectogenic substances, when the anoxic priapism installs, it is recommended surgical treatment to avoid the ischemic necrosis of the cavernous bodies. Actually, the EFP treatment is the same as for any priapism and it is inconsistently effective and especially potentially dangerous.