The standard for my doctor's office is after your 2-3 week follow up appointment. Although they were willing to write it for 6 weeks. I think I could have gone back after I was off of pain meds (4-5 days) but I would have been exhausted. It also depends on how well you recover. I am only 36, I had zero complications, a starting BMI of 42 and was otherwise very healthy - all of which made my recovery very easy. Now if I was still at my old job, which I hated, I would have taken the full 6 weeks.