Viagra, also known as Viagra, is a safe and reliable oral drug for the treatment of erectile dysfunction (impotence), but many people take the drug after the effect is not ideal, only the correct use to play a very good role, so before using the drug should pay attention to the following: 1, should be stimulated After taking Viagra, but also need to be under considerable sexual stimulation can be effective. Sexual stimulation includes audio-visual stimulation, kissing, touching, etc. Older couples can also affect the efficacy of Viagra due to insufficient sexual stimulation. 2, master the timing Generally 30 minutes to 1 hour before sex, due to the slow absorption of drugs, older patients need to take an hour earlier. The recommended dose of Viagra for the first application is 25 mg, which can be increased to 50 mg or 100 mg if it is not enough. However, any increase in dose should be agreed by the doctor. 4, not easy to give up Among patients taking Viagra, in addition to the above-mentioned misconceptions, only about 60% of patients saw results on their first dose due to high expectations, poor communication and interaction between couples. Nearly 40% of the patients have experienced success after multiple doses. Some studies have shown that generally take about 8 times will achieve the best results. 5, the couple with the erectile dysfunction treatment process, the wife’s cooperation will also produce excellent results for the husband. The couple should have good psychosexual communication, the wife can also take the initiative, consciously to arouse the husband’s desire for sex. 6, check the authenticity of the product Because of the exact efficacy of Viagra, some people will translate it as “Viagra”. However, it should be reminded that the Viagra package sold in pharmacies does not have the word “Viagra” on it, but rather “Viagra”, which is only produced by Pfizer Pharmaceuticals Ltd, so don’t be fooled by fake drugs. Of course and Viagra there are two similar products: tadalafil and vardenafil, three products have their own strengths, but in order to achieve a good effect, you must understand the above knowledge.