Can I give my cat 2 flea medications in one month if one is washed off?

My cat has fleas and last week I gave my cat Hartz. Immediately after I gave it I learned how bad Hartz is and gave him a wash with diluted soapy water. Can I give him Revolution now for his fleas or should I still wait a month?

He is 6 months old. Short-haired Tabby.
Asked Aug 26, 2015

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