Can inderal (propranolol) cause insomnia nightmares and trouble sleeping?

Possibly so: Trouble sleeping, as well as vivid and unusual dreams can occur when taking Inderal (propranolol). Worsening of depression can also be a side effect. Other medications and underlying medical conditions may interfere with sleep. You list being on Klonopin - is that being prescribed for anxiety? Persistent mood and anxiety symptoms impair one's ability to sleep, as well as the quality of sleep. Hope this helps.

Yes, not common: During one of the clinical studies of Inderal, (propranolol) there were 16-17.5% rate of unspecified sleep disorders and 2-6% rate of nightmares. The drug also known to cause agitation, which could certainly disturb sleep.