PRISTIQ 50 mg PROLONGED-RELEASE TABLETS

Introduction

Package Leaflet:Informationfor thepatient

Pristiq 50 mg prolonged-release tablets

desvenlafaxine

Read all of this leaflet carefully before you start takingthismedicine, because it contains important information for you.

• Keep this leaflet, as you may need to read it again.
• If you have any further questions, ask your doctor or pharmacist.
• This medicine has been prescribed for you only. Do not pass it on to others, as it may harm them, even if their symptoms are the same as yours.
• If you experience any side effects, talk to your doctor or pharmacist, even if they are not listed in this leaflet. See section 4.

Contents of the pack

1. What is Pristiq and what is it used for
2. What you need to know before you take Pristiq
3. How to take Pristiq
4. Possible side effects
5. Storing Pristiq

1. Contents of the pack and other information

1. What is Pristiq and what is it used for

Pristiq is an antidepressant that belongs to a group of medicines called serotonin and noradrenaline reuptake inhibitors (SNRIs). This group of medicines is used to treat depression. People with depression may have lower levels of serotonin and noradrenaline (also known as norepinephrine) in the brain. It is not fully understood how antidepressants work, but they may help increase the levels of serotonin and noradrenaline in the brain.

Pristiq is a treatment for adults.

2. What you need to know before you take Pristiq

Do not take Pristiq:

• if you are allergic to desvenlafaxine, venlafaxine, or any of the other ingredients of this medicine (listed in section 6).
• if you are also taking or have taken in the last 14 days, any medicine known as a monoamine oxidase inhibitor (MAOI) used to treat depression, infections, or Parkinson's disease. Taking an MAOI (e.g., linezolid or methylene blue) with other medicines like Pristiq can cause serious or potentially life-threatening side effects. Also, you must wait at least 7 days after you stop taking Pristiq before taking any MAOI (see also sections "Serotonin syndrome" and "Other medicines").

Warnings and precautions

Tell your doctor if you have had any of the following conditions before starting to take Pristiq or if they appear during treatment with Pristiq:

• if you or someone in your family has a history of or has had mania (a state of excitement, feeling of euphoria, or hyperirritability) or bipolar disorder (extreme mood changes, e.g., from depression to euphoria).
• if you have a history of aggressive behavior.
• if you have eye problems, such as certain types of glaucoma (increased pressure in the eye).
• if you have a history of high blood pressure or high blood pressure.
• if you have a history of heart problems or heart attack.
• if you have a history of seizures (convulsions).
• if you have a history of bleeding disorders (tendency to develop bruises), or if you are pregnant (see section Pregnancy, breastfeeding, and fertility), or if you are using non-steroidal anti-inflammatory drugs (NSAIDs), aspirin, and other medicines that may increase the risk of bleeding when used at the same time as desvenlafaxine.
• if you have a history of kidney problems.
• if you have a history of low sodium levels in the blood (hyponatremia).
• if you have a history of high cholesterol, or if your cholesterol levels increase.
• if you experience the following side effects: agitation (excitability and restlessness), altered consciousness, confusion, coma, palpitations, increased blood pressure, elevated body temperature, excessive sweating, lack of coordination, muscle spasms or stiffness, tremors, nausea, vomiting, and diarrhea. Contact your doctor immediately, as you may be suffering from serotonin syndrome (a disorder that can be serious and, in rare cases, potentially life-threatening).
• if treatment is stopped abruptly, withdrawal symptoms may occur (e.g., mood changes, irritability, agitation, dizziness, anxiety, confusion, headache, sleep disturbances, ringing in the ears (tinnitus), seizures, visual problems, and hypertension). Therefore, it is essential to reduce the dose of Pristiq gradually and under medical supervision, whenever you and your doctor decide to stop treatment.

Some medicines in the same group as Pristiq (called SSRIs/SNRIs) may cause symptoms of sexual dysfunction (see section 4). In some cases, these symptoms persist after stopping treatment.

Suicidal thoughts and worsening of your depression or anxiety disorder

If you are depressed and/or have anxiety disorders, you may sometimes have thoughts of harming yourself or committing suicide. These thoughts may increase when you start taking antidepressants, as these medicines take time to work, usually a few weeks, but sometimes longer.

You may be more likely to think this way:

• If you have had previous thoughts of suicide or self-harm.
• If you are a young adult. Clinical trial data have shown an increased risk of suicidal behavior in young adults (less than 25 years of age) with psychiatric disorders who were treated with antidepressants.

If you have thoughts of harming yourself or committing suicide at any time, contact your doctor or go to a hospital directly.

You may find it helpful to tell a relative or close friendthat you are depressed or have an anxiety disorder and ask them to read this leaflet. You might ask them to tell you if they think your depression or anxiety is getting worse, or if they are worried about changes in your behavior.

Dry mouth

Dry mouth has been reported in 18% of patients treated with desvenlafaxine. This may increase the risk of tooth decay. Therefore, you should be careful with your oral hygiene.

Elderly patients

In some elderly patients, it cannot be ruled out that they may be more sensitive to desvenlafaxine.

Children and adolescents

Pristiq should not normally be used in children and adolescents. Additionally, you should know that in patients under 18 years of age, there is a greater risk of side effects such as suicidal attempts, hostility (mainly aggression, confrontational behavior, and irritability) when taking this class of medicines. Nevertheless, the doctor may prescribe this medicine to patients under 18 years of age when they decide it is appropriate for the patient. If the doctor prescribes this medicine to a patient under 18 years of age and you wish to discuss this decision, please go back to your doctor. You should inform your doctor if any of the above symptoms develop or worsen when these patients under 18 years of age are taking Pristiq. Also, the long-term effects on safety and those related to growth, maturity, and cognitive and behavioral development of this medicine have not yet been established.

Taking Pristiq with other medicines

Tell your doctor or pharmacist if you are taking, have recently taken, or might take any other medicines.

It is especially important to tell your doctor if you are taking any of the following medicines:

• monoamine oxidase inhibitors (MAOIs), e.g., medicines containing linezolid (an antibiotic used to treat infections) and methylene blue (see the section "Do not take Pristiq").
• other medicines that contain venlafaxine or desvenlafaxine (also used to treat depression).
• triptans (used for migraines).
• medicines for treating depression, e.g., tricyclic antidepressants, amphetamines, lithium, selective serotonin reuptake inhibitors (SSRIs), or serotonin and noradrenaline reuptake inhibitors (SNRIs).
• medicines that contain sibutramine (used for weight loss).
• medicines for pain, e.g., opioids such as tramadol, fentanyl, and its analogs, tapentadol, meperidine, methadone (also used for treatment of narcotic withdrawal syndrome and opioid dependence), and pentazocine.
• medicines that contain dextromethorphan (used for coughs).
• products that contain St. John's Wort (also known as "Hypericum perforatum", a natural or herbal remedy used to treat mild depression).
• products that contain tryptophan (used for problems such as sleep and depression).
• medicines that contain ketoconazole (an antifungal).
• also, if you are being treated by other healthcare professionals, inform them that you are taking Pristiq.

Serotonin syndrome or reactions similar to Neuroleptic Malignant Syndrome (NMS)

Rarely, a disorder called serotonin syndrome or reactions similar to NMS may occur, which can cause significant changes in brain, muscle, and digestive system function due to high levels of serotonin in the body. This potentially life-threatening condition may occur when taking medicines like Pristiq, particularly when taken with other medicines mentioned above.

See the section "Warnings and precautions" or possible side effects related to serotonin syndrome or reactions similar to NMS.

Switching antidepressants

When switching treatment from another antidepressant to desvenlafaxine, symptoms of withdrawal from the initial antidepressant have appeared. Your doctor may gradually reduce the dose of your initial antidepressant to help decrease these symptoms.

Interactions with laboratory tests

False positives for certain substances such as phencyclidine (PCP) and amphetamines may occur in urine analysis of patients who are taking or have taken desvenlafaxine, even several days after stopping treatment.

Taking Pristiq with food, drinks, and alcohol

Pristiq tablets can be taken with or without food.

You should avoid drinking alcohol while using Pristiq.

Pregnancy, breastfeeding, and fertility

If you are pregnant or breastfeeding, think you may be pregnant, or plan to become pregnant, consult your doctor before using this medicine.

If you take Pristiq in the final stages of pregnancy, there may be an increased risk of excessive vaginal bleeding shortly after delivery, especially if you have a history of bleeding disorders. Your doctor or midwife should know that you are taking Pristiq to advise you. When similar medicines (SSRIs) are taken during pregnancy, there may be an increased risk of a serious effect on the baby called persistent pulmonary hypertension of the newborn (PPHN), causing the baby to breathe faster and turn blue. These symptoms usually start during the first 24 hours after the baby is born. If your baby has these symptoms, you should contact your doctor and/or midwife immediately.

Tell your doctor before stopping treatment with Pristiq during pregnancy, as you may experience a relapse of depression.

If you take Pristiq during the second half of pregnancy until the end of pregnancy, you may have an increased risk of high blood pressure and protein in the urine (preeclampsia). You may also have an increased risk of bleeding after delivery (postpartum hemorrhage).

If you take Pristiq during pregnancy, inform your doctor and/or midwife, as your baby may have withdrawal symptoms when born. These symptoms may appear soon after birth and may require hospitalization. The symptoms include difficulty feeding or breathing problems. If your baby has these or other symptoms when born and you are concerned, contact your doctor and/or midwife.

Desvenlafaxine passes into breast milk. There is a risk of an effect on the baby. Therefore, do not use Pristiq during breastfeeding unless your doctor specifically tells you to.

Driving and using machines

Pristiq may cause dizziness, drowsiness, and blurred vision. Do not drive or operate tools or machines until you know how this medicine affects you.

3. How to take Pristiq

Follow exactly the administration instructions of this medicine given by your doctor. In case of doubt, consult your doctor again.

The recommended dose is 50 mg once a day. Your doctor may increase your dose to 100 mg once a day or even up to a maximum of 200 mg once a day if necessary.

If you have kidney problems or a history of kidney problems, consult your doctor, as you may need to take a different dose of Pristiq.

This medicine should be taken orally, approximately at the same time each day. The tablets should be swallowed whole with liquid, without dividing, crushing, chewing, or dissolving them.

Do not worry if you see the structure of a tablet in your stool after taking this medicine.As the tablet travels through your gastrointestinal tract, the active substance desvenlafaxine is slowly released. The tablet structure does not dissolve and is eliminated in the stool. Therefore, although the tablet structure may appear in your stool, you will have absorbed your dose of desvenlafaxine.

If you take more Pristiqthan you should

Contact your doctor or pharmacist immediately if you take more of this medicine than your doctor has prescribed.

In case of overdose or accidental ingestion, consult the Toxicology Information Service, Tel. 91 562 04 20.

If you forget to take Pristiq

If you miss a dose, take it as soon as you remember. However, if it is already time for your next dose, skip the missed dose and take only one dose, as usual. Do not take a double dose to make up for the missed dose.

If you stop taking Pristiq

Do not stop taking this medicine or change the dose without your doctor's advice, even if you feel better. Your doctor will prefer to gradually reduce the dose of Pristiq to avoid side effects. It is known that patients experience side effects when they stop taking this medicine, especially if they have taken a high dose and for a prolonged period. Some of these side effects are dizziness, nausea, headache, fatigue, irritability, diarrhea, anxiety, nightmares, and excessive sweating. Therefore, the dose should be reduced slowly and under medical supervision, in case you and your doctor decide to stop treatment with Pristiq. If you experience any of these or other symptoms that bother you, consult your doctor (see the section "Warnings and precautions"). In some patients, complete cessation of the medicine may require months or even longer.

If you have any further questions on the use of this medicine, ask your doctor or pharmacist.

4. Possible Adverse Effects

Like all medicines, this medicine can cause adverse effects, although not all people suffer from them.

Severe Adverse Effects

If you notice any of the following signs, inform your doctor immediately or go to the nearest hospital:

• Heart problems, such as rapid heart rate, increased blood pressure, or chest pain.
• Eye problems, such as blurred vision.
• Nervous system problems, such as dizziness, numbness, and tingling, movement disorder (e.g., involuntary muscle movements, restlessness), convulsions, or seizures.
• Psychiatric problems, such as hyperactivity and euphoria.
• Drug allergy, such as rash, throat swelling, or breathing difficulties.

List of Possible Adverse Effects

The adverse effects and frequency (probability of occurrence) mentioned below have been observed in patients. In general, these adverse effects occurred more frequently during the first week of treatment.

Very common affects more than 1 in 10 patients

Common affects between 1 and 10 in 100 patients

Uncommon affects between 1 and 10 in 1,000 patients

Rare affects between 1 and 10 in 10,000 patients

Frequency not known (cannot be estimated from available data)

Immune System Disorders

Uncommon: allergic reaction

Metabolism and Nutrition Disorders

Common: loss of appetite

Rare: hyponatremia (decreased sodium concentration in blood)

Psychiatric Disorders

Very common: insomnia

Common: withdrawal syndrome, anxiety, nervousness, unusual dreams, irritability, decreased libido, absence of orgasm

Uncommon: distortion of self-image and reality, abnormal orgasm

Rare: mania (state of overexcitement, feeling of euphoria or hyperirritability), hypomania (state of excitement and excessive activity), and hallucinations

Nervous System Disorders

Very common: headache, dizziness, somnolence

Common: tremors, numbness, and tingling, attention deficit, alteration of taste

Uncommon: loss of consciousness, abnormal movements (dyskinesia)

Rare: serotonin syndrome (characterized by symptoms such as agitation, altered consciousness, confusion, coma, palpitations, increased blood pressure, elevated body temperature, excessive sweating, lack of coordination, muscle spasms or stiffness, tremors, nausea, vomiting, and diarrhea), convulsions (seizures), movement disorders (e.g., involuntary muscle movements, restlessness)

Eye Disorders

Common: blurred vision, pupil dilation

Ear and Labyrinth Disorders

Common: sensation of vertigo, tinnitus

Cardiac Disorders

Common: rapid heart rate, palpitations (feeling of rapid, irregular, or strong heartbeat)

Rare: heart problems often caused by stressful situations (Takotsubo cardiomyopathy)

Vascular Disorders

Common: high blood pressure, hot flashes

Uncommon: low blood pressure when changing position, peripheral coldness

Respiratory Disorders

Common: yawning

Uncommon: nasal bleeding

Gastrointestinal Disorders

Very common: nausea, dry mouth, constipation

Common: diarrhea, vomiting

Rare: acute pancreatitis (inflammation of the pancreas)

Skin and Subcutaneous Tissue Disorders

Very common: excessive sweating

Common: rash

Uncommon: total or partial hair loss

Rare: Stevens-Johnson syndrome (erythema multiforme consisting of a hypersensitivity reaction affecting the skin and mucous membranes), swelling under the skin, sensitivity to light

Musculoskeletal Disorders

Common: muscle stiffness

Renal and Urinary Disorders

Uncommon: urinary retention, difficulty urinating, protein in the urine

Reproductive System Disorders

Common: erectile dysfunction, delayed ejaculation, ejaculatory failure

Uncommon: ejaculation disorder, sexual dysfunction

Frequency not known: heavy vaginal bleeding shortly after childbirth (postpartum hemorrhage), see "Pregnancy, Lactation, and Fertility" in section 2 for more information

General Disorders

Common: fatigue, weakness, chills, feeling of restlessness

Investigations and Medical Evaluations

Common: alteration of liver tests, weight gain, weight loss, high blood pressure

Uncommon: increased cholesterol levels in blood, increased triglyceride values in blood, increased prolactin hormone values in blood

Reporting Adverse Effects

If you experience any type of adverse effect, consult your doctor or pharmacist, even if it is a possible adverse effect that does not appear in this leaflet. You can also report them directly through the Spanish Pharmacovigilance System for Human Use Medicines: www.notificaRAM.es. By reporting adverse effects, you can contribute to providing more information on the safety of this medicine.

5. Storage of Pristiq

Keep this medicine out of sight and reach of children.

Do not use this medicine after the expiration date stated on the packaging after "CAD". The expiration date is the last day of the month indicated.

This medicine does not require special storage conditions.

Medicines should not be disposed of via wastewater or household waste. Deposit the packaging and unused medicines at the SIGRE collection point in the pharmacy. In case of doubt, ask your pharmacist how to dispose of the packaging and unused medicines. This will help protect the environment.

6. Package Contents and Additional Information

Pristiq Composition

The active ingredient is desvenlafaxine (as succinate monohydrate).

Each tablet contains 50 mg of desvenlafaxine (as succinate monohydrate).

The other components (excipients) are: hypromellose, microcrystalline cellulose, talc, and magnesium stearate.

The coating of the 50 mg tablets is Opadry II 85F94487, which contains: partially hydrolyzed polyvinyl alcohol, titanium dioxide (E171), macrogol/PEG 3350, talc (E553b), and yellow and red iron oxides (E172).

Product Appearance and Package Contents

Light pink, pyramid-shaped tablet with a "W" on the top and a "50" on the flat side.

Pristiq 50 mg is available in packs of 28 tablets.

Marketing Authorization Holder and Manufacturer

Marketing Authorization Holder

Pfizer, S.L.

Avda. de Europa, 20 B

Parque Empresarial La Moraleja

28108, Alcobendas, Madrid (Spain)

Manufacturer

Pfizer Ireland Pharmaceuticals Unlimited Company, Newbridge, County Kildare (Ireland).

or

Pfizer Manufacturing Deutschland GmbH

Mooswaldallee 1

79108 Freiburg im Breisgau

Germany

Date of Last Revision of this Leaflet:August 2023

Detailed and updated information on this medicine is available on the website of the Spanish Agency for Medicines and Health Products (AEMPS) http://www.aemps.gob.es