Klonopin and period. It may cause serious problems if you take it in higher dosages or for a longer period of time than your healthcare provider recommends (see Klonopin Addiction)My quest: in addition to the Klonopin I also received a script for Xanax. In most patients, Klonopin is usually prescribed for a period of 4 to 6 months, though at times your doctor may decide to keep you on this medication for a longer . . . No period after starting nuvigil and klonopin . 5mg so I took half yesterda... more