I usually get 26 units of Botox every 3 months to treat crow's feet and forehead. I find that the results dramatically wear off after 5 weeks. Assuming that I needer more units, on my last treatment I got 42 units instead of the usual 26, but it's 5 weeks later now, and the effects are wearing off. Should I consider going back to a lower dosage but at more frequent intervals (every six weeks)? Any advice appreciated!