Phase 1b/2a Unblinded Study of Responses in Premenopausal Women With HSDD to Lorexys Evaluating Efficacy and Safety

Women are diagnosed with Hypoactive sexual desire disorder (HSDD) if they experience chronic
loss of desire for sex together with significant distress or interpersonal difficulties due
to this lack of desire. HSDD can have a serious effect on emotional well-being and
interpersonal relationships.

There are no U.S. Food and Drug Administration-approved treatments for HSDD. Off-label
treatments include testosterone, which is not always effective and can be accompanied by
side effects such as excess hair growth, acne, and decreases in high-density lipoprotein
(HDL) cholesterol levels.

Research in laboratory animals and clinical observations in humans suggest that re-balancing
chemical messengers in the brain may stimulate sexual desire. S1 Biopharma's Lorexys® is a
novel use fixed-dose combination (FDC) in an oral pill. Lorexys® combines two agents
intended to restore balance to the brain's centers that control sexual function. Such
effects are hoped to help women with HSDD.

The compound is Phase 2-ready without prior trials (Phase I safety studies) because the two
agents have often been used together; individually, they are FDA-approved for treating
other disorders (depression, for example), and in a large US survey, the two were taken
together in about 23% of patients who were prescribed one of the two agents.

This research study requires subjects to take three different study medications for four
weeks each, with at least a one-week "wash-out" period after each, and to report on rating
scales how they feel. The medication is open-label (the subjects can see which medication
they are receiving). That should not interfere with the evaluations or cause a big "placebo
effect" because only a low proportion of women with HSDD have responded to a placebo in
prior research studies of other compounds when using the same measures of efficacy.

Participation lasts 16 weeks, with 8 clinic visits. A weekly, but no daily, self-rating is
required between visits.

Inclusion Criteria:

1. Age 25 to 50 and still having regular menstrual periods. Women with intact ovaries
are classified as premenopausal for this study, even if they have had a hysterectomy.
Women who have had both ovaries removed, even if under age 50 and with an intact
uterus, are not acceptable for this study.

2. In a stable, monogamous, communicative, reasonably amicable relationship for at least
one year

3. Meets DSM-IV-TR criteria for Generalized Acquired Hypoactive Sexual Desire Disorder
and HSDD is her main sexual disorder

4. Over the prior month, didn't respond to sexual initiations by partner

5. At screen and baseline, low or no and infrequent or rare desire for sex

6. At screen, has clinically relevant sexual distress as per FSDS-R score

7. Otherwise healthy physically and mentally. Minor chronic conditions not affecting
sexual function are allowed. Side effects from any continuing concomitant
medications must be mild and stable or nil.

8. Not pregnant or lactating for six months; using medically reliable contraception,
i.e., diaphragm or (male or female) condom and spermicide, IUD, tubal sterilization,
hormonal contraception (oral, vaginal, or implant), or (if the investigator finds the
patient credibly monogamous) vasectomy of male partner.

9. Gives informed consent for and is willing to undergo all of the scheduled evaluations

10. Prompt for screening and baseline visits, is cooperative, and takes reasonable
directions without excessive explanations

11. Her sexual partner is in a monogamous relationship with her, is sexually unimpaired
(erectile dysfunction allowed only if adequately treated), and is available to her at
least half of the time (in days per week).

Exclusion Criteria:

1. Masturbates more than once a month.

2. Sexual aversion or sexual pain disorder

3. Chronic conditions that may reasonably be expected to be unstable or to affect sexual
function (e.g., gastrointestinal bleeding, diabetes, frequent asthma, Major
Depressive or anxiety disorder, history within the prior 6 months of suicidality or
drug abuse; history of breast, cervical, uterine, ovarian or other systemic cancer).

4. BMI (a standard ratio of weight to height) over 35.0 (obese)

5. Requires CYP3A4, CYP 2B6, or CYP 2D6 strong inhibitor or inducer drugs

6. Takes any sex hormone other than an approved hormonal contraceptive

7. Takes an antiepileptic/mood stabilizer, antipsychotic, antidepressant, anti-anxiety,
or hypnotic drug or has a history of allergic reaction to such drugs

9. Drinks more than 7 alcoholic drinks per week (12-oz beer, 4-oz wine, 1 ½ oz liquor etc)
10. Drinks more than 6 cups of coffee or tea per day 11. History of seizures 12. Long QT
syndrome (QTc <=480 msec), other significant cardiovascular disease 13. moderate or severe
dysfunction of the liver (any LFT >=3x ULN) or renal dysfunction (BUN > 30 or Cr >2.0) 14.
Uses sedating antihistamines or prescription sedatives 15. History of blood clots or
abnormal bleeding tendencies, including daily use of medications adversely affecting
coagulation, e.g., NSAIDs, systemic corticosteroids, or >81 mg aspirin daily.