Yes, you could even push it 6 wks but no more than 6 wks max at a time. The thing about Lantus is although it doesn’t really peak, it can still drive your glucose down to dangerous levels, but it does this over time. For example, lets say you are up to 40 iu’s and you take it late evening, you may not start dipping until mid next day. Just keep carbs up more and you should be fine. I’d definitely keep carbs up around 3-400 grams per day when you get your dosage that high. Lantus is a different animal than fast acting slins. The effects won’t come on right away, but yes it will indeed get you lower without proper carb intake. the positive with it is it’s smooth and steady. You’ll notice that your strength will go through the roof pretty quickly, and you might be up 10 lbs within only a week. Good luck, and thanks for following the blog!!