Can dandruff shampoo stop working after long term use?

A friend of mine recently told me dandruff shampoo can stop working after a while if you use it for a long time. Anyone know if this is true?Can dandruff shampoo stop working after long term use?
YES; Dandruff Shampoo is JUST LIKE Regular Shampoo in that you need 2 CHANGE IT once in a While ! !Can dandruff shampoo stop working after long term use?
This IS true, especially if you use it everyday. If you use it once a week, or bi-weekly, this is less likely to happen.
Yes your hair will become immune to that chemical. A herbal rinse is a safe method of removing dandruff. Apply lemon juice with the rind on the scalp .After 5 minutes wash off with shampoo and water. More simple remedies for dandruff at http://usefulinfo-dandruff.blogspot.com/