Man no idea why you ' ve zeroed in on phenazepam . I ' ve taken absurd doses of every benzo from diazepam to triazolam , and phenazepam is the only one that has caused me to black out for weeks . It basically felt like bunk , I thought I had been ripped off there were no effects until I just blacked out and came to weeks later . If you ' re just looking for a long lasting anxiolytic maybe give flubromazepam a shot , much better drug and you won ' t have to worry about the shitty Russian postal system I ' ve had a lot of legal dealings w Russians and even if you used registered mail it ' s a crapshoot , lots of postal theft etc . Also pills are the worst thing to get through customs , except maybe pot . They pop on xray so easily .