Safety and Tolerability Study of E-WE Thrombin in Healthy Adult Subjects

Inclusion Criteria:

1. Healthy, adult, male and/or female (females of non-childbearing potential only), 18 to
55 years of age, inclusive, at screening.

2. Continuous non-smoker, who has not used nicotine-containing products for at least 3
months prior to dosing, based on subject self-reporting.

3. Body mass index (BMI) ≥ 18 and < 29 (kg/m2) at screening and weight between 50 and 125
kg (inclusive) at screening.

4. Medically healthy with no clinically significant medical history, physical
examination, laboratory profiles, vital signs or electrocardiograms, as deemed by the
PI or designee.

5. A female must be of non childbearing potential and must have undergone one of the
following sterilization procedures at least 6 months prior to dosing:

- hysteroscopic sterilization;

- bilateral tubal ligation or bilateral salpingectomy;

- hysterectomy;

- bilateral oophorectomy. or be postmenopausal with amenorrhea for at least 1 year
prior to dosing and follicle stimulating hormone (FSH) serum levels consistent
with postmenopausal status.

6. A non vasectomized, male subject must agree to use a condom with spermicide or abstain
from sexual intercourse during the study until 90 days beyond the dose of study drug.
(No restrictions are required for a vasectomized male provided his vasectomy has been
performed 4 months or more prior to dosing of study drug. A male who has been
vasectomized less than 4 months prior to dosing must follow the same restrictions as a
non vasectomized male).

7. If male, must agree to not donate sperm from dosing until 90 days after dosing.

8. Understands the study procedures in the informed consent form (ICF), and be willing
and able to comply with the protocol.

Exclusion Criteria:

1. Subject is mentally or legally incapacitated or has significant emotional problems at
the time of the screening visit or expected during the conduct of the study.

2. History or presence of clinically significant medical or psychiatric condition or
disease in the opinion of the PI or designee.

3. History of any illness that, in the opinion of the PI or designee, might confound the
results of the study or poses an additional risk to the subject by their participation
in the study.

4. History or presence of alcoholism or drug abuse within the past 2 years prior to
dosing.

5. Consumes 3 units or more of alcohol per day (e.g., 1 unit is equivalent to 240 mL of
wine, 1 bottle of beer [12 oz.], or 1 shot of liquor [1 oz.]).

6. History or presence of hypersensitivity or idiosyncratic reaction to the study drug
and excipients or related compounds.

7. History or presence of a disease or disorder, acquired or inherited, that is active,
or could be reasonably expected to become active during the study, including but not
limited to:

- Hypersensitivity to ß-lactam / penicillin derivatives;

- Bleeding and blood coagulation disorders, including stroke, hemophilias,
thrombophilias, or heparin-induced thrombocytopenia;

- Ischemic disorders, including stroke, heart attack, coronary artery disease;

- Gastrointestinal disorders, including gastrointestinal bleeds, gallstones,
ulcers, diseases or dysfunction of the liver and excluding appendectomy and/or
cholecystectomy;

- Genitourinary disorders, including renal disease;

- Cardiovascular disorders, including aneurysms, vasculitis;

- All conditions that are associated with taking medications for pain;

- Infection of any organ or system within 30 days of dosing;

- Malignant and cancerous neoplasms of any organ or system;

- Psychiatric and behavioral disorders;

- A clinically significant hematological disorder of any type;

- Inflammation and inflammatory diseases of any organ system.

8. Females of childbearing potential.

9. Females who are pregnant or who are lactating.

10. Positive urine drug or alcohol results at screening or check in.

11. Positive results at screening for human immunodeficiency virus (HIV), hepatitis B
surface antigen (HBsAg), or hepatitis C antibodies (HCV).

12. Supine blood pressure is less than 90/50 mmHg or greater than 140/90 mmHg at
screening.

13. Supine heart rate is lower than 40 bpm or higher than 99 bpm at screening.

14. QTcF interval > 450 msec for males or > 460 msec for females, or history of prolonged
QT syndrome at screening.

15. Estimated creatinine clearance < 90 mL/minutes at screening using the Cockcroft Gault
estimation.

16. Unable to refrain from or anticipates the use of:

- Any drug, including prescription and non-prescription medications, herbal
remedies, or vitamin supplements beginning approximately 14 days prior to dosing
and throughout the study.

- Any oral or injectable anticoagulant (e.g., warfarin, heparin, low molecular
weight heparin, etc.), coagulants (aprotinin, tranexamic acid,
epsilon‐aminocaproic acid, and aminomethylbenzoic acid), anti-platelet (e.g.,
clopidogrel), nonsteroidal anti-inflammatory drugs (NSAIDs) and/or
acetylsalicylic acid (ASA) beginning approximately 10 days prior to dosing and
throughout the study.

- Any drugs known to be significant inducers of cytochrome P-450 enzymes and/or P
glycoprotein, including St. John's Wort, for 28 days prior to dosing and
throughout the study.

Appropriate sources (e.g., Flockhart TableTM) will be consulted to confirm lack of
pharmacokinetic/ pharmacodynamic interaction with study medication. Acetaminophen (up
to 2 g per 24 hour period) or any other treatment of an adverse event, drug related or
not, and considered appropriate and allowable by the PI or designee may be permitted
after dosing.

17. Has been on a diet incompatible with the on study diet, in the opinion of the PI or
designee, within the 30 days prior to dosing and throughout the study.

18. Has participated in strenuous exercise or physical activity within 72 hours prior to
Day 1, unless deemed acceptable by the PI or designee.

19. Donation of blood or significant blood loss within 56 days prior to dosing.

20. Plasma donation within 7 days prior to dosing.

21. Has been hospitalized within 2 months of Day -1.

22. Participation in another clinical study within 30 days prior to dosing. The 30-day
window will be derived from the date of the last blood collection or dosing, whichever
is later, in the previous study to Day 1 of the current study.

23. Surgery within the past 90 days prior to dosing which in the opinion of the PI or
designee is clinically relevant.

24. Presence of any scars, or tattoos which may obscure the injection site, as deemed by
PI or designee.

25. Any condition or circumstance, in the opinion of the PI or designee, which may make
the subject unlikely to complete the study or comply with study procedures and
requirements, or may pose a risk to the subject's safety.