Hello, My Son Is 3 Yrs Old. From. Last One

Hello, my son is 3 yrs old. From. Last one year I m giving him laxopeg for contipation.earlier I started with 1 sachet daily. Slowly . Decreased to 1/2 sachet every two days. But from last 3 days I m giving 1 sachet daily but he has not done his potty.please suggest