This is a single-center, two-period, randomized, open-label, crossover pharmacokinetic (PK) study in healthy adult volunteers to evaluate dose proportionality of diazepam nasal spray using two dose levels

Inclusion Criteria:

• Screening body weight 88 to 111 kg, inclusive;
• General good health with no clinically significant abnormalities that would affect ability to complete study as determined by medical history, physical examination, visual evaluation of the septum and turbinates to document baseline anatomy, electrocardiogram, clinical laboratory test results;
• Negative drug and alcohol testing;
• Negative pregnancy test for female subjects of childbearing potential.

Exclusion Criteria:

• Subject who is not surgically sterile or female subject who is less than 2 years postmenopausal, and who does not agree to use a highly effective birth control method during the study and up to 3 months after the last dose of investigational product;
• In the judgment of the Investigator, any clinically significant abnormality (such as septal perforations) or illness that would interfere with participation in this study as determined by medical history, physical examination (including visual exam of septum and turbinates), ECG, clinical laboratory results, or other screening safety tests;
• Any other condition and/or situation that causes the investigator to deem a subject unsuitable for the study.