How long does pirfenidone take to see the effect, need to be based on the changes in the condition and the sensitivity of the patient to the drug, there is no specific course of treatment in the drug instructions, you should follow the doctor’s instructions for treatment and adjust the time of medication. This product can inhibit the proliferation of fibroblasts and collagen synthesis, reduce the fibrotic markers of cells and tissues, improve the lung function indexes of patients with mild to moderate idiopathic pulmonary fibrosis, and is used in the treatment of mild and moderate idiopathic pulmonary fibrosis. Generally take how long to see the effect, the drug instruction does not specify, specific need to follow the doctor’s advice according to the condition of the treatment and adjust the time of medication. Adverse reactions include nausea, vomiting, dyspepsia, rash, hepatic impairment, drowsiness. Hepatic dysfunction, severe renal dysfunction or patients requiring dialysis, pregnant and lactating women are prohibited. If the diagnosis of pulmonary fibrosis need to regular hospitals, improve the relevant examination, and follow the doctor’s instructions standardized treatment, so as not to delay the condition.