Pristiq (Desvenlafaxine Succinate)
Complete patient guide for uses, dosage, side effects, and safety information
Quick Facts
What Is Pristiq Used For?
Pristiq is a medication that helps manage depression by increasing the levels of serotonin and noradrenaline in the brain.
Primary Uses
Pristiq is primarily used for treating depression and preventing its relapse.
How It Works
It works by enhancing the levels of serotonin and noradrenaline, which are essential neurotransmitters in the brain.
Good to know: Pristiq is not considered addictive.
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How to Take Pristiq
Taking Pristiq correctly is crucial for its effectiveness.
Dosage Instructions
The usual dose is 50 mg taken once daily, with or without food. Swallow the tablet whole with a glass of water. Do not crush, chew, or dissolve it.
What If You Miss a Dose?
If you miss a dose and it's less than 12 hours until your next dose, skip the missed dose. Otherwise, take it as soon as you remember, but do not double the dose.
Important: Never take a double dose to make up for a missed one.
Available Tablet Strengths
Side Effects
Like all medications, this medicine can cause side effects. Most are mild and temporary, but some require medical attention.
Common Side Effects
These side effects occur relatively frequently and usually don’t require emergency care:
- Nausea
- Diarrhea
- Constipation
- Difficulty passing urine
- Changes in behavior (e.g., anxiety, irritability)
- Dizziness
- Fatigue
- Excessive sweating
- Weight changes
Seek immediate medical attention if you experience:
- Severe mood changes or thoughts of suicide
- Neuroleptic malignant syndrome symptoms
- Serotonin syndrome symptoms
- Seizures
- Severe allergic reactions
Important Warnings
There are specific warnings to consider before using Pristiq.
Who Should Not Take Pristiq
Do not take Pristiq if you are allergic to desvenlafaxine or venlafaxine, or if you have taken monoamine oxidase inhibitors in the last 14 days.
Medical Conditions to Discuss
Discuss any history of seizures, bipolar disorder, blood pressure issues, glaucoma, bleeding tendencies, kidney or liver problems, and low sodium levels with your doctor.
Pregnancy and Breastfeeding
Pristiq is not recommended during pregnancy or breastfeeding due to potential risks to the baby.
Drug Interactions
Certain medications can interact with Pristiq, affecting its efficacy.
- Monoamine oxidase inhibitors
- Medications for bipolar disorder
- Other antidepressants
- Drugs affecting serotonin levels (e.g., tramadol, fentanyl)
- Medications for ADHD
- Weight loss medications
- Triptans
- Blood thinners (e.g., aspirin, NSAIDs, warfarin)
Alcohol & Driving
Caution is advised regarding alcohol consumption and operating machinery while taking Pristiq.
Alcohol
Avoid alcohol while taking Pristiq as it may increase side effects.
Driving and Operating Machinery
Be cautious when driving or using machinery until you know how Pristiq affects you, as it may cause drowsiness.
Storage
Store Pristiq in its blister pack in a cool, dry place below 25°C, away from moisture and heat.
Overdose Information
If you suspect an overdose, seek immediate medical attention. Contact your doctor or the Poisons Information Centre at 13 11 26.
Frequently Asked Questions
You may start to feel better after two weeks, but it can take several weeks for the full effects.
Yes, you can take Pristiq with or without food.
No, Pristiq is not considered addictive.
Do not stop taking Pristiq without consulting your doctor, as stopping suddenly can lead to withdrawal symptoms.
It is advised to avoid alcohol while taking Pristiq.
Weight changes can occur, including weight gain or loss.
Elderly patients should discuss their health conditions with their doctor before taking Pristiq.
If you miss a dose, skip it if it's less than 12 hours until your next dose, otherwise take it as soon as you remember.
Important Disclaimer
This information is intended for general educational purposes only and should not be considered medical advice. Always consult your healthcare provider or pharmacist before starting, stopping, or changing any medication.
If you think you may have a medical emergency, call your doctor or emergency services immediately.