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Sildenafil citrate commonly known as Viagra is used as treatment for impotency. This is a disorder in which a man is unable to achieve penile erection nor having to maintain erection during sexual intercourse. Viagra is said to be more effective if the patient is sexually aroused.
This is an oral drug. Variation on the drug's dosage varies according to age and if the patient is experiencing any disease. Adults are commonly prescribed 50 mg of Viagra an hour before engaging into any sexual activity and can be taken as much as it is needed. Dosage may increase to about 100 mg and can be reduced up to 25 mg depending on the patient's tolerance and the effectiveness of Viagra. The elderly does not need any dosage requirements.
Patients who have dangerous renal impairment with a creatinine clearance of <30 mL/min are prescribed with a 25 mg dose. For patients who are experiencing mild to moderate renal damage, physicians usually do not give them with any dosage requirement.
Patients taking Viagra simultaneously with ritonavir are prescribed to take the drug not more than the maximum single dose of 25 mg, within the timeframe of 2 days. Patients who are also using CYP3A4 such as ketoconazole,itraconazole,erythromycin and saquinavir inhibotors the should start the therapy of Viagra with its starting loading dose of about 25 mg.
Patients should ensure that they are stable on their Alpha blocker therapy to decrease the potential of developing postural hypertension before taking Viagra. Another thing to note is to start taking Viagra on lower doses.
There was a conducted clinical study on healthy volunteers given with 800 mg of Viagra showed that adverse effects experienced is the same as to those who take lower doses. Before taking Viagra, converse with your physician to avoid any complications.