... "RAN" brand as that works and the generic doesn't. A new prescription I just received isn't working as well and the pharmacist insists it is the "RAN". One doesn't get immune over night. I don't believe it is the RAN. I could even take a 1/2 or a RAN and it worked. This new prescription doesn't. if I wake in the night, I can't go back to sleep and then it tends to make me sleepy all day. The RAN gives me a good 8 hrs sleep even if I have to get up to use the washroom. It has worn off by the morning if I have had a good sleep