Patient Information Leaflet
Desvenlafaxine Alter 100 mg prolonged-release tablets EFG
Read this leaflet carefully before you start to take this medicine because it contains important information for you.
Desvenlafaxina Alter is an antidepressant that belongs to a group of medications called serotonin and noradrenaline reuptake inhibitors (SNRIs). This group of medications is used to treat depression. People with depression may have low levels of serotonin and noradrenaline (also known as norepinephrine) in the brain. The exact way antidepressants work is not fully understood, but they may help increase the levels of serotonin and noradrenaline in the brain.
Desvenlafaxina is a treatment for adults.
Consult your doctor if you have experienced any of the following conditions before taking Desvenlafaxina or if they occur during treatment with this medication:
Some medications in the group to which Desvenlafaxina belongs (called SSRIs/SNRIs) may cause sexual dysfunction (see section 4). In some cases, these symptoms persist after discontinuing treatment.
Thoughts of suicide and worsening of depression or anxiety disorder
If you are depressed and/or have anxiety disorders, you may have had thoughts of harming yourself or committing suicide. These thoughts may increase when starting to take antidepressants, as these medications take time to work, usually two weeks, but sometimes longer.
You may be more likely to have these thoughts:
If you have thoughts of harming yourself or committing suicide at any time,contact your doctor or go to the hospital directly.
You may find it helpful to tell a close family member or friend who is depressed or has an anxiety disorder, and ask them to read this leaflet. You may also ask them to tell you if they think your depression or anxiety is getting worse, or if they are concerned about changes in your behavior.
Dry mouth
Dry mouth has been reported in 18% of patients treated with desvenlafaxina. This may increase the risk of tooth decay. Therefore, you should take good care of your oral hygiene.
Older adults
In some older adults, it cannot be ruled out that there may be increased sensitivity to desvenlafaxina.
Children and adolescents
Desvenlafaxina should not be used in children and adolescents. Additionally, you should know that, in patients under 18 years, there is a higher risk of adverse effects such as suicidal behavior, hostility (predominantly aggression, confrontational behavior, and irritability) when taking this type of medication. However, the doctor who prescribes your medication may decide that it is in your best interest to use this medication. If your doctor has prescribed this medication to a patient under 18 years and wants to discuss this decision, please return to your doctor. You should inform your doctor if any of the symptoms listed above develop or worsen when these patients under 18 years are taking Desvenlafaxina.
Furthermore, the long-term effects of this medication on safety, growth, maturation, and cognitive and behavioral development have not yet been demonstrated.
Other medications and Desvenlafaxina Alter
Inform your doctor or pharmacist if you are using, have used recently, or may need to use any other medication.
It is especially important to inform your doctor if you are taking any of the following medications:
Serotonin syndrome or reactions similar to Neuroleptic Malignant Syndrome (NMS)
Rarely, this medication can produce a disorder called serotonin syndrome or reactions similar to NMS that can cause significant changes in brain, muscle, and digestive system function due to elevated serotonin levels in the body. This potentially life-threatening state can occur when taking medications like Desvenlafaxina, especially when taken with other medications mentioned above.
See the section “Warnings and precautions” or the possible side effects related to serotonin syndrome or reactions similar to NMS.
Switching antidepressants
When switching from another antidepressant to desvenlafaxina, withdrawal symptoms from the initial antidepressant have appeared. Your doctor may reduce your initial antidepressant medication dose gradually to help minimize these symptoms.
Interactions with laboratory tests
Falsely positive results for substances such as phenylcylidine (PCP) and amphetamines may occur in urine tests of patients taking or having taken desvenlafaxina, even several days after stopping treatment.
Taking Desvenlafaxina Alter with food, drinks, and alcohol
Desvenlafaxina Alter tablets can be taken with or without food. You should avoid taking alcohol while using this medication.
Pregnancy, breastfeeding, and fertility
If you are pregnant or breastfeeding, or think you may be pregnant, or plan to become pregnant, consult your doctor before using this medication.
If you take desvenlafaxina 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 this medication to advise you. When taking similar medications (SSRIs) during pregnancy, there may be an increased risk of a severe condition for the baby called persistent pulmonary hypertension of the newborn (PPHN), causing the baby to breathe faster and turn blue. These symptoms usually start within the first 24 hours after the baby is born. If your baby has these symptoms, contact your doctor and/or midwife immediately.
If you take Desvenlafaxina during pregnancy, inform your doctor and/or midwife, as your baby may experience withdrawal symptoms when born. These symptoms may appear immediately after birth and may require hospitalization. Among the symptoms are difficulty breastfeeding or respiratory problems. If your baby has these or other symptoms when born and you are concerned, contact your doctor and/or midwife.
Desvenlafaxina passes into breast milk. There is a risk of adverse effects for the baby. Therefore, do not use Desvenlafaxina during breastfeeding unless your doctor specifically advises you to do so.
Driving and operating machinery
This medication may cause dizziness, drowsiness, and blurred vision. Do not drive or operate tools or machinery until you know how this medication affects you.
Desvenlafaxina Alter contains yellow-orange S (E110).
This medication may cause allergic reactions because it contains yellow-orange S (E110).
It may cause asthma, especially in patients allergic to aspirin.
Follow exactly the administration instructions of this medication as indicated 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 up 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 since you may need to take a different dose of Desvenlafaxina.
This medication should be taken orally, approximately at the same time every day. The tablets should be swallowed whole with liquid, without dividing them, crushing them, chewing them, or dissolving them.
Do not worry if you observe the structure of a tablet in your stool after taking Desvenlafaxina Alter.As the tablet travels along your gastrointestinal tract, the active ingredient desvenlafaxine is released slowly. The tablet structure does not dissolve and is eliminated in the stool. Therefore, despite the fact that it is possible that the tablet structure may appear in your stool, you will have absorbed your dose of desvenlafaxine.
If you take more Desvenlafaxina Alter than you should
Immediately contact your doctor or pharmacist if you take more Desvenlafaxina than your doctor has prescribed.
In case of overdose or accidental ingestion, consult the Toxicological Information Service, Tel. 91 562 04 20, indicating the medication and the amount ingested.
If you forgot to take Desvenlafaxina Alter
If you have not taken 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 compensate for the missed dose.
If you interrupt treatment with Desvenlafaxina Alter
Do not stop taking Desvenlafaxina, or change the dose, without your doctor's indication, even if you feel better. Your doctor prefers to gradually reduce the dose of Desvenlafaxina to avoid adverse effects. It is known that patients experience adverse effects when they stop taking this medication, especially if they have taken a high dose and for a prolonged period. Some of these adverse effects are: dizziness, nausea, headache, fatigue, irritability, diarrhea, anxiety, nightmares, and excessive sweating. Therefore, the dose should be reduced gradually whenever possible, and under medical supervision, if you and your doctor decide to interrupt treatment with Desvenlafaxina.
If you experience any of these or other symptoms that bother you, consult your doctor (see the "Warnings and precautions" section).
If you have any other doubts about the use of this medication, ask your doctor or pharmacist.
Severe side effects
If you notice any of the following signs, inform your doctor immediately or visit the nearest hospital:
Side effect list
The side effects and frequency (probability of occurrence) mentioned below have been observed in patients. In general, these side effects occurred more frequently during the first week of treatment.
Very frequent: affects more than 1 in 10 patients
Frequent: affects between 1 and 10 in 100 patients
Rare: affects between 1 and 10 in 1,000 patients
Rare: affects between 1 and 10 in 10,000 patients
Unknown frequency: (cannot be estimated from available data)
Immune system disorders
Rare: allergic reaction
Metabolism and nutrition disorders
Frequent: loss of appetite
Rare: hyponatremia (decreased sodium concentration in blood)
Psychiatric disorders
Very frequent: insomnia
Frequent:withdrawal syndrome,anxiety, nervousness, rare dreams, irritability, decreased libido, absence of orgasm
Rare: distorted self-image and reality, abnormal orgasm
Rare: mania (state of overexcitement, feeling of euphoria or hyperirritability), hypomania (state of excessive excitement and activity) and hallucinations
Nervous system disorders
Very frequent: dizziness, headache, somnolence
Frequent:tremors, numbness and tingling, attention deficit, altered sense of taste
Rare: loss of consciousness,abnormal movements (dyskinesia)
Rare:serotonin syndrome (characterized by symptoms such as agitation (excitability and restlessness), altered consciousness, confusion, coma, palpitations, increased blood pressure, elevated body temperature, excessive sweating, lack of coordination, muscle spasms or rigidity, tremors, nausea, vomiting, and diarrhea), seizures (convulsions), movement disorders (e.g., involuntary muscle movements, restlessness)
Eye disorders
Frequent: dilated pupils, blurred vision
Ear disorders
Frequent: tinnitus, sensation of vertigo
Cardiac disorders
Frequent: rapid heart rate, palpitations (sensation of rapid, irregular, or strong heartbeat)
Frequent:high blood pressure, hot flashes
Rare: peripheral coldness, low blood pressure upon changing position
Respiratory disorders
Frequent: yawning
Rare: nasal hemorrhages
Gastrointestinal disorders
Very frequent: nausea, dry mouth, constipation
Frequent: vomiting, diarrhea
Rare: acute pancreatitis (inflammation of the pancreas)
Skin and subcutaneous tissue disorders
Very frequent: excessive sweating
Frequent: skin rash
Rare: 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, light sensitivity
Musculoskeletal disorders
Frequent: muscle rigidity
Renal and urinary disorders
Rare: difficulty urinating, urinary retention, proteinuria
Reproductive system and breast disorders
Frequent: erectile dysfunction, delayed ejaculation, ejaculatory insufficiency
Rare: sexual dysfunction, ejaculation disorder
Unknown frequency: excessive postpartum vaginal bleeding (postpartum hemorrhage), see "Pregnancy, lactation, and fertility" in section 2 for more information
General disorders
Frequent: fatigue, weakness, chills,restlessness
Frequent:abnormal liver function tests, increased weight, weight loss, high blood pressure
Rare: increased cholesterol levels in blood,increased triglyceride levels in blood, increased prolactin levels in blood
Reporting side effects
If you experience any type of side effect, consult your doctor or pharmacist, even if it is a possible side effect that does not appear in this leaflet. You can also report them directly through the Spanish System for the Vigilance of Medicinal Products for Human Use:www.notificaRAM.es.
By reporting side effects, you can contribute to providing more information on the safety of this medication.
Keep this medication out of the sight and reach of children.
Do not use this medication after the expiration date (EXP) that appears on the packaging and blister, after EXP. The expiration date is the last day of the month indicated.
This medication does not require special storage conditions.
Medications should not be disposed of through drains or trash. Dispose of the packaging and medications you no longer need at the SIGRE collection point of the pharmacy. If in doubt, ask your pharmacist how to dispose of the packaging and medications you no longer need. By doing so, you will help protect the environment.
The coating film of the 100 mg tablets contains: poly(vinyl alcohol), titanium dioxide (E171), macrogol, talc, iron oxide red (E172), and aluminium lake yellow-orange S (E110).
Orange-red, biconvex, round tablet. The tablet dimensions are 10.1 ± 0.2 mm.
Desvenlafaxina Alter 100 mg is available in a container of 28 tablets.
Laboratorios Alter, S.A.
Mateo Inurria 30
28036 Madrid
Spain
PharOS MT Ltd.
HF62X, Hal Far Industrial Estate
BBG3000 Birzebbugia (Malta)
The detailed and updated information of this medicine is available on the website of the Spanish Agency for Medicines and Medical Devices (AEMPS) http://www.aemps.gob.es/
The average price of Desvenlafaxina alter 100 mg comprimidos de liberacion prolongada efg in July, 2025 is around 20.39 EUR. Prices may vary depending on the region, pharmacy, and whether a prescription is required. Always check with a local pharmacy or online source for the most accurate information.
Have questions about this medication or your symptoms? Connect with a licensed doctor for guidance and personalized care.