Ranibizumab’s onset of action time is mostly in 5-7 days, but the specific still need to look at the individual situation. Ranibizumab injection is a kind of anti-neovascular factor drugs, mainly used for the treatment of wet (neovascular) age-related macular degeneration, clinically most patients with the drug 5-7 days before the gradual effect. However, each person’s physical condition, medical condition, and absorption ability are different, so the exact time of onset of effect varies. Some patients have the effect in 2 days after injection, but some patients need about 10 days to see the effect, there are individual differences. Ranibizumab injection can cause nasopharyngitis, headache, intraocular inflammation and other adverse reactions, in addition to periocular infections, active intraocular inflammation and other patients are prohibited to use. It is recommended that the drug be taken under the guidance of a specialized physician or clinical pharmacist.