also known as penile self injection is effective way to treat erectile dysfunction. This treatment is used in patients who are not able to achieve satisfactory erection with pills or have
severe pills related side effect. Effective as well as safe dosage is the most important aspect, which should properly calibrated under the guidance of a specialist. Lower dosage may not work and higher dosage can lead to priapism i.e. unwanted painful very long erection. This injection is prepared by mixture of 2 or 3 different drugs in an appropriate ratio ( bimix or trimix ) because these drugs act by different mechanisms so are more effective if combination is used. These combinations also reduce the effective amount of each drug required and so decreasing their side effects. One should avoid repeating injection, after one injection has not worked as this will significantly increase the total dose and lead to priapism. This injections can be used in long term and doesn’t harm overlying skins the needle is very thin. This injection is cheap costing few hundreds.