Heavy smoker, Heavy benzodiazepine tolerance. I take my diazepam (20mg) four times a day, it's like methadone for chronic pain, it may have a long half life but it's anxiolytic and all it's other 4-5 properties all have varying lengths of efficacy. For example, the reason you hear most doctors order Ativan 4mg IV STAT patient is seizing, is that IV diazepam which used to be to Ativan what Hydromorphone did to Morphine, essentially making it the new gold standard, just like Ativan/Lorazepam is because it is able to keep seizures under control for a longer amount of time and they have more room to work with it, I've seen 12mg lorazepam given, but I've never seen any doctor who thinks they won't raise eyebrows even for a seizing patient if they used the equivalent amount of diazepam, which would be 10mg per 1mg of ativan, so 120mg diazepam seems like a lot even though it's IMO a moderate dose given the circumstances. So like methadone, which only kills pain for the same amount of time as oxycodone basically, it needs to be dosed at least 3-4 if not more times a day when taken for chronic pain.