Consider starting at a dose of 25 mg in patients with hepatic dysfunction e. All you need to do is log into their site and check out the list of medicines and health care products available. It depends on the platform and insurance provider. At the same time, on-treatment function was better in treated patients who were less impaired at baseline. Accordingly, caution is necessary for patients already on ritonavir when prescribing sildenafil. However, all medications come with risks. VIAGRA improved these aspects of sexual function: frequency, firmness and maintenance of erections; frequency of orgasm; frequency and level of desire; frequency, satisfaction and enjoyment of intercourse; and overall relationship satisfaction.Online Drugstore & Medicine Delivery Service in the Philippines – Buy your medicines, vitamins & supplements without leaving your home.  · Viagra; Descriptions. Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. The penis is one of the areas where . If you have these symptoms, stop taking VIAGRA and contact a doctor right away. have or have had heart problems such as a heart attack, irregular heartbeat, angina, chest pain, narrowing of the aortic valve, or heart failure. have low blood pressure, or high blood pressure that is not controlled.