Need more info: Dou you mean still effective 30 days after you last used it? Might depend a bit on the strength of the specific formula, but overall would not expect it to be of much residual effectiveness if it has been 30 days since last used.
Answered 2/17/2014
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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