The generic name of Viagra is Sildenafil Citrate, and this product is not recommended to be broken up and taken in two doses, as the dosage may be insufficient and may also affect the effectiveness of the drug. Sildenafil citrate belongs to the medication for treating male impotence, and its common drug specifications are 25mg/tablet, 50mg/tablet and 100mg/tablet. You should choose the right dosage of tablets according to your needs, and take the whole tablet before sexual activity, it is not recommended to break it, otherwise it will lead to inaccurate dosage, and it may also affect the effect of the drug, resulting in poor results during sexual life. Common side effects of this product include rash, dizziness, headache, dyspepsia, nausea, flushing, and visual abnormalities, etc. It is contraindicated for those who are allergic to this drug, and this drug should not be combined with nitrate. It is recommended that you consult your physician before using this product and should not take the drug blindly on your own.