FDA approves the medium tablet strength, 2.9 mg/0.71 mg, of ZUBSOLV®

Uppsala, Sweden – June 10, 2015 – Orexo AB (publ) announces today that it has
received approval from the U.S. Food and Drug Administration (FDA) of medium
dosage strength of ZUBSOLV® (buprenorphine/naloxone CIII sublingual tablet) for
maintenance treatment of opioid dependence. The new dosage strength is 2.9
mg/0.71 mg buprenorphine/naloxone CIII sublingual tablets. The new 2.9 mg/0.71
mg dosage strength is expected to be launched during second half of 2015.

The new dosage strength complements the existing strengths of 1.4 mg/0.36 mg,
5.7 mg/1.4 mg, 8.6 mg/2.1 mg and 11.4 mg/2.9 mg tablets and enables patients to
receive their optimal dose in one tablet. The new strength is made with the
advanced, proprietary sublingual tablet formulation in ZUBSOLV providing higher
bioavailability, a fast dissolve time, small tablet size and menthol flavor.

"Orexo remains fully committed to advancing the treatment of opioid dependence.
The new tablet strength complements the existing dosage range and enables more
patients to get the right dosage in only one tablet and thus reduces the need to
combine different dosage strengths. The approval of 2.9 mg/0.71 mg brings Orexo
one step closer to having the broadest dosage range within opioid addiction
treatment and it again demonstrates the strong capabilities of Orexo to fast and
efficiently expand the portfolio," said Nikolaj Sørensen, CEO and President of
Orexo AB.

The advanced formulation provided by ZUBSOLV meets the needs expressed by
patients, such as improved taste and fast dissolve time. Meeting patient needs
may have the potential to improve patient compliance, thus reducing relapse
rates and improving successful patient outcomes. ZUBSOLV is the only opioid
dependence treatment option available in the highest level of child resistant,
unit dose, F1 packaging, designed to reduce the chance of unintended pediatric
exposure.

For further information, please contact:
Nikolaj Sørensen, President and CEO Tel: +46 (0)703-50 78 88, E-mail:
ir@orexo.com

About Orexo
Orexo is a specialty pharmaceutical company commercializing its proprietary
product Zubsolv® for maintenance treatment of opioid dependence in the US.
Zubsolv is an advanced formulation of buprenorphine and naloxone using Orexo’s
unique knowledge and expertise in sublingual drug delivery. R&D is focusing on
reformulation of known substances to new improved products that meet great unmet
medical needs by using its patented proprietary technologies. Orexo’s share is
listed on Nasdaq Stockholm Exchange Mid Cap (STO: ORX) and is available as ADRs
on OTCQX (ORXOY) in the US. Orexo’s global headquarters and R&D are based in
Uppsala, Sweden.

For more information about Orexo, please visit www.orexo.com

For information about opioid dependence, please visit www.outthemonster.com

About ZUBSOLV®
ZUBSOLV (buprenorphine and naloxone) sublingual tablet (CIII) is indicated for
the maintenance treatment of opioid dependence and should be used as part of a
comprehensive treatment plan, which includes counseling and psychosocial
support. Treatment should be initiated under the direction of physicians who are
certified under the Drug Addiction Treatment Act of 2000, and who have been
assigned a unique identification number ("X" number).

ZUBSOLV sublingual tablets can be abused in a manner similar to other opioids,
legal or illicit. Clinical monitoring appropriate to the patient’s level of
stability is essential. Liver function tests should be monitored before and
during treatment. Children who take ZUBSOLV sublingual tablets can have severe,
possibly fatal, respiratory depression. Emergency medical care is critical. Keep
ZUBSOLV sublingual tablets out of the sight and reach of children.

Adverse events commonly observed with the sublingual administration of
buprenorphine/naloxone sublingual tablets during clinical trials and post
-marketing experience are headache, nausea, vomiting, hyperhidrosis,
constipation, signs and symptoms of withdrawal, insomnia, pain and peripheral
edema.

Further information on ZUBSOLV can be found at www.zubsolv.com

Important Safety Information

Keep ZUBSOLV in a secure place away from children. If a child accidentally takes
ZUBSOLV, this is a medical emergency and can result in death. Get emergency help
right away 

ZUBSOLV can cause serious and life-threatening breathing problems. Call your
doctor right away or get emergency help if (a) you feel faint, dizzy, or
confused; (b) your breathing gets much slower than is normal for you; (c) you
feel sleepy and uncoordinated; (d) you have blurred vision; (e) you have slurred
speech; (f) you cannot think well or clearly; or (g) you have slowed reflexes
and breathing. In an emergency, have family members tell the emergency
department staff that you are physically dependent on an opioid and are being
treated with ZUBSOLV

The most common side effects of ZUBSOLV include: headache, drug withdrawal
syndrome, nausea, decrease in sleep (insomnia), vomiting, pain, increased
sweating, swelling of the extremities, and constipation. Tell your doctor about
any side effect that bothers you or that does not go away

Do not switch from ZUBSOLV to other medicines that contain buprenorphine without
talking with your doctor. The amount of buprenorphine in a dose of ZUBSOLV is
not the same as the amount of buprenorphine in other medicines that contain
buprenorphine. Your doctor will prescribe a starting dose of buprenorphine that
may be different than other buprenorphine-containing medicines you may have been
taking

ZUBSOLV contains an opioid that can cause physical dependence. Do not stop
taking ZUBSOLV without talking to your doctor. You could become sick with
uncomfortable withdrawal signs and symptoms because your body has become used to
this medicine. Physical dependence is not the same as drug addiction. ZUBSOLV is
not for occasional or "as needed" use

An overdose, and even death, can happen if you take benzodiazepines, sedatives,
tranquilizers, or alcohol while using ZUBSOLV. Ask your doctor what you should
do if you are taking one of these. You should not drink alcohol while taking
ZUBSOLV, as this can lead to loss of consciousness or even death

Do not inject ("shoot-up") ZUBSOLV. Injecting ZUBSOLV may cause life-threatening
infections and other serious health problems. Injecting ZUBSOLV may cause
serious withdrawal symptoms such as pain, cramps, vomiting, diarrhea, anxiety,
sleep problems, and cravings

Before taking ZUBSOLV, tell your doctor about all the medicines you take,
including prescription and over-the-counter medicines, vitamins, and herbal
supplements

Before taking ZUBSOLV, tell your doctor if you are pregnant or plan to become
pregnant. It is not known if ZUBSOLV will harm your unborn baby. If you take
ZUBSOLV while pregnant, your baby may have symptoms of withdrawal at birth. Talk
to your doctor if you are pregnant or plan to become pregnant

Before taking ZUBSOLV, tell your doctor if you are breastfeeding or plan to
breastfeed. ZUBSOLV can pass into your breast milk and may harm the baby. Talk
to your doctor about the best way to feed your baby if you take ZUBSOLV. Monitor
your baby for increased sleepiness and breathing problems

Do not drive, operate heavy machinery, or perform any other dangerous activities
until you know how ZUBSOLV affects you. Buprenorphine can cause drowsiness and
slow reaction times. This may happen more often in the first few weeks of
treatment when your dose is being changed, but can also happen if you drink
alcohol or take other sedative drugs when you take ZUBSOLV

ZUBSOLV is a controlled substance (CIII) because it contains buprenorphine,
which can be a target for people who abuse prescription medicines or street
drugs. Keep your ZUBSOLV in a safe place to protect it from theft. Never give
your ZUBSOLV to anyone else; it can cause death or harm them. Selling or giving
away this medicine is against the law

To report negative side effects associated with taking ZUBSOLV, please call 1
-888-982-7658. You are encouraged to report negative side effects of
prescription drugs to the FDA. Visit www.fda.gov/medwatch or call 1-800-FDA-1088

Please see full Prescribing Information and Medication Guide for ZUBSOLV.