By intravenous injection 10 mg 3 times a day, use intravenous route when the oral route is not appropriate. After chronic dosing of 80 mg three times a day sildenafil to patients with PAH, lesser reductions than above in systolic and diastolic blood pressures were observed a decrease in both of 2 mmHg. But drinking lots of alcohol can make it more difficult to get an erection. Patients on sildenafil achieved a statistically significant reduction in mPAP compared to those on placebo. Sildenafil does not affect any type of contraception, including the combined pill or emergency contraception. Figure 1. Dose adjustments due to interactions for sildenafil When used for Erectile dysfunction Manufacturer advises a starting dose of 25 mg with concurrent use of moderate and potent inhibitors of CYP3A4.View sildenafil information, including dose, uses, side-effects Manufacturer advises reduce dose to 20 mg twice daily with concurrent use of moderate inhibitors of CYP3A4. The prescription must be endorsed ‘SLS’. For more information see Prices in the BNF, under How to use the BNF. Medicinal forms. There can be variation in the. Sildenafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. It works if you have erection problems by temporarily increasing blood flow to your penis when you get sexually excited.. It works in pulmonary hypertension by relaxing blood vessels in your chest. This increases the blood supply to your lungs and reduces the workload of . AdGet Deals and Low Prices On sildenafil mg On Amazon. Read Customer Reviews & Find Best Sellers. Free, Easy Returns On Millions Of test1.ru has been visited by 1M+ users in the past month.