vgr300 refers to sildenafil citrate tablets (300mg/tablet specification), a box of 1~10 tablets ranging, the specific use of medication must be under the guidance of a doctor. vgr is the English abbreviation for sildenafil citrate tablets, 300 represents the content of the active ingredient in a single tablet is 300mg, the current clinical common box of 1 tablet, 5 tablets, 10 tablets and other specifications. It should be noted that this drug is suitable for the treatment of male erectile dysfunction, but prohibited for minors under 18 years of age, allergic to this drug, also prohibited and nitroglycerin and other nitrate drugs at the same time, the use of medication may also appear headache, flushing, visual abnormalities and other adverse reactions. Therefore, those who need to use Sildenafil citrate tablets must follow the doctor’s instructions to standardize the use of drugs, and closely observe the efficacy of the drug and the reaction, if there is any maladaptation, consult a doctor in a timely manner. Do not blindly take the drug or increase or decrease the dosage on your own, so as not to cause adverse consequences.