Benzos are known to cause mood instability when you take them on a regular schedule your body gets used to the smooth feeling then they wear off and your body craves that smooth and panics when it doesn't get it that why people are always abusing benzos by taking them more often , before the scheduled time or more of them they are trying to stay in that smooth spot. Many peoples anxiety gets worse on them but they are addicted and any suggestions that they quit cause panic.