Sildenafil Citrate is a drug that has been synthesized; however, the functioning of the drug requires some natural triggers.  The sooner you take the pill you are on with a regulation to produce an erection; however, it does not work just like that it requires real human reflexes and stimuli.

The effectiveness of the drug is more when there is the basic human stimulus and erotic approaches required for the safe erection process.  You have to stick on to the dosages prescribed and it can be harmful to be on higher dosages than what were actually prescribed for your functioning.

The brain should be receiving the constant reflexes for stimuli to trigger the hormones and enzyme processes required for stimulating an erection.  Ideally sensations like touch and other approaches in love making are mandatory in processing out a sustained erection even in the presence of Sildenafil Citrate.

Blood from the whole of the body tend to concentrate in the penile region and after the erection has been processed blood rushes back to the body and the penis gets its normal non-erect position.

Ideally sexual issues and erection issues are addressed by an urologist. If you are not at east to discuss the issues with your own doctor it is important for you to get a referral to the doctor with whom it will really work.

Ideally, it is good you take your partner with you so that they do not imagine nightmares about your condition. This will allow you to be able to discuss and share your concerns with your partner in a better way.