Feb 12, - Start clonazepam (Klonopin) 1 mg upon awakening in the middle of the night. 4. onset of sleep & the timing of arousal. • An entrained. The abrupt withdrawal of Klonopin, particularly in those patients on long-term, .. Agents that have a fast onset of action include clorazepate, diazepam, Consider administering a beta agonist such as albuterol for severe bronchospasm. Albuterol Sulfate Inhaler Over the Counter. Such medicines include Valium, Lorazepam, Ativan, Diazepam, Clonazepam, Klonopin and others. Onset of action of the inhaled version is typically within 15 minutes and lasts for two to six.