Ketoconazole shampoo. Damaged grafts?

It is best to ask your surgeon about post operative care as each doctor has their unique regimen.  

No damage could be done to the transplanted grafts after the first 5 days from your procedure. We recommend aggressive hair wash following the first 5 days. 

 Using a shampoo with ketoconazole one month after fue, will not damage the grafts...After two weeks of hair transplantation  it is acceptable  to wash hairs as normal /preoperative period of surgery. All scabs should be cleaned with pressured (not gentle) massage to transplant area  after 2 weeks .Dont forget that you may wash your head with normal pressure and if you need you can use a wet towel with soap for massage the scabby area, it Works very well to remove scabs .Patient may feel free to loosen any scabs on his/her head by massaging and that will not  damage the grafts after 2 weeks . 

At a month I doubt that you could have damaged the grafts as final healing should have occurred by then