I get lantus lows about every four to six months. While lantus works well for me about 99% of the time, every so often a quick low kicks in and throws a diabetic punch. I've been T2 for about 10 years and I use intensive insulin therapy with an A1c of about 6.4 .
I inject twice a day in my stomach, once in the morning right after I get up and two hours before bed. Injecting two hours before bed gives me time to wait out any possible lantus low. When I injected into my thigh I got a lantus lows every two or three days.
My all time lowest low was 26, talk about sweating and fretting. I live by my self and one needs to heed those lows, glad I can feel them coming on at 50-60. I do have a Dexcom G5 CGM and it really helps.
My warning sign for a upcoming lantus low is when blood comes out of the hole after I pull the needle out right after injecting lantus, most every time I'm due for a low within 20 min to 1 hour, dropping from 150-180 to 40-60 or so. It depends upon how much lantus is absorbed into the capillary. There are certain areas of my stomach I never inject because there are more capillaries. I used to carry a lot more weight, lost 1/3rd of my weight about 110 pounds years back before T2, I figure that where the most stretch marks are is where the most capillaries hide.
I use syringes injecting lantus as shallow as possible and a pen for humalog. I drink orange juice for the lows, usually takes 2-3-4 cans 6 oz each low and the severity.
I keep a very detailed log as well. One of my worst experiences with a low was when the low hit in the morning while riding my motorcycle to work. Before I left I was around 120, about 30 minutes later I was pretty shaky checked my BS when I got to work and it was down to around 35-40, but I made it. I knew what it was when it hit. When the low hits I just try to keep a cool head and treat the low. As my pharmacist says who is diabetic, if you are coherent to know what is going on and can treat it, you'll be fine. I always carry a meter and some fast acting carbs when ever I leave the house.