Will using a good dandruff or dry scalp shampoo daily help pass a hair follicle drug test?

No. The specialized shampoo formulated for use on lice and their eggs is lethal to them. But it won't remove the metabolites from hair shafts that have been laid down there during your body's through processing of the chemicals you've exposed yourself to. Lice shampoo's chemistry will do nothing for the problem. There are special shampoo formulations that are effective for resolving your particular issue, but they are only supplied by a few companies, and they cost. One possible source of info can be viewed by using the link provided. Best of luck.