How many times should i use the lindane lotion or shampoo?

Ask your MD: Complete informaiton about lindane and how to use it can be found here: http://www.Fda.Gov/downloads/drugs/drugsafety/ucm133687.Pdf you should always ask the md who prescribed the medication, as they may have a specific way the want you to use it that may not be the same as the link above.

Lindane: The fda recommends only a single treatment with lindane. This is because of the risk of serious side effects and even death when lindane is applied too early the second time. It is not known how soon after applying lindane that it is safe to apply a second dose.