What is desvenlafaxine used for?

Desvenlafaxine is used to treat adults who have major depressive disorder (MDD).

Can I crush desvenlafaxine tablets?

No, you must swallow desvenlafaxine tablets whole with fluid; do not divide, crush, chew, or dissolve them.

What should I do if I miss a dose of desvenlafaxine?

The label advises taking the medication at approximately the same time each day to maintain consistency.

Can I take desvenlafaxine with aspirin or ibuprofen?

Taking desvenlafaxine with aspirin, NSAIDs, or other blood thinners may increase your risk of bleeding.

Is desvenlafaxine safe for elderly patients?

It can be used, but older patients may experience a higher risk of blood pressure drops when standing up.

What is serotonin syndrome?

Serotonin syndrome is a serious risk if desvenlafaxine is taken with other drugs that increase serotonin levels.

Should I stop desvenlafaxine suddenly?

No, you should reduce the dose gradually whenever possible to avoid discontinuation syndrome.

Desvenlafaxine | CAS 93413-62-8 | KYYIDSXMWOZKMP

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Serotonin and norepinephrine reuptake inhibitor (SNRI)

Desvenlafaxine is an extended-release tablet used to treat adults with major depressive disorder. It belongs to a class of drugs called SNRIs, which work by increasing the levels of serotonin and norepinephrine in the brain.

How it worksDesvenlafaxine works by blocking the reabsorption of two natural chemicals in the brain, serotonin and norepinephrine, making more of them available to help regulate mood.

Brand names:KHEDEZLA, PRISTIQ

Used for

Major depressive disorder (MDD) in adults

Conditions

Major depressive disorder

Class

SNRIAntidepressantSerotonin and norepinephrine reuptake inhibitor (SNRI)Central Nervous System

How to take

FormsExtended-release tablet

RoutesOral

The standard dose is 50 mg once daily, taken with or without food. It should be taken at about the same time every day. Do not crush, chew, or break the tablets.

Patients with kidney issues may need a lower dose (25 mg). For those with moderate to severe liver issues, the maximum dose is 100 mg per day.

Missed dose: Take the tablet at approximately the same time each day. If you miss a dose, do not double up; follow your doctor's instructions for tapering.

Key warnings

Antidepressants like desvenlafaxine can increase the risk of suicidal thoughts and behaviors in children, adolescents, and young adults. Monitor all patients closely for changes in mood or behavior.

·Antidepressants like desvenlafaxine can increase the risk of suicidal thoughts and behaviors in children, adolescents, and young adults. Monitor all patients closely for changes in mood or behavior.
·Risk of serotonin syndrome when used with other serotonergic drugs.
·Potential for increased blood pressure; regular monitoring is needed.
·Higher risk of bleeding if taken with aspirin, NSAIDs, or blood thinners.
·Risk of withdrawal symptoms if the medicine is stopped suddenly; taper the dose gradually.
·May cause sexual dysfunction.

Do not use if

·Known allergy to desvenlafaxine or its ingredients.
·Using MAOIs or having used them within the last 14 days.
·Being treated with linezolid or intravenous methylene blue.

Side effects

Common

NauseaDizzinessInsomnia (trouble sleeping)SweatingConstipationSleepinessDecreased appetiteAnxietyMale sexual dysfunction

Serious

·Serotonin syndrome
·High blood pressure
·Increased risk of bleeding
·Seizures
·Low blood sodium (hyponatremia)
·Vision problems (angle-closure glaucoma)
·Manic or hypomanic episodes
·Lung issues (interstitial lung disease)
·Suicidal thoughts or behaviors

Seek help if

·Serotonin syndrome symptoms
·Suicidal thoughts
·Severe allergic reaction (angioedema)
·Difficulty urinating or vision changes

Interactions

·MAOIs (like linezolid or methylene blue) - can cause serotonin syndrome.
·Other serotonergic drugs - increases risk of serotonin syndrome.
·Aspirin, NSAIDs, or blood thinners - increases bleeding risk.

FoodA high-fat meal can increase the maximum concentration of the drug by about 16%.

AlcoholNot explicitly stated, but overdose data mentions venlafaxine is often taken with alcohol.

Special populations

PregnancyThere are no studies on desvenlafaxine in pregnant women, but studies on its parent drug, venlafaxine, show no clear link. There is a known risk of increased postpartum bleeding if SNRIs are used in the month before delivery.

BreastfeedingLimited data shows low levels of desvenlafaxine in breast milk and no adverse reactions in infants, but the benefits of breastfeeding should be weighed against potential risks.

PediatricDesvenlafaxine has not been proven safe or effective for treating depression in children or adolescents.

GeriatricIn older adults, there was a higher chance of a sudden drop in blood pressure when standing up (orthostatic hypotension). Kidney function should be checked when determining doses for elderly patients.

Talk to your doctor

Monitor

·Blood pressure
·Mood changes
·Signs of serotonin syndrome
·Signs of bleeding

Questions to ask

·How will this affect my blood pressure?
·Is it safe to take with my other medications like NSAIDs?
·How should I taper off this medication?
·What should I watch for regarding suicidal thoughts?

Pharmacokinetics

OnsetSteady-state plasma concentrations are achieved within approximately 4 to 5 days.

BioavailabilityAbsolute oral bioavailability is about 80%.

MetabolismDesvenlafaxine is the major active metabolite of venlafaxine.

Practical

OverdoseThere is limited human experience with desvenlafaxine overdose, but information from its parent drug (venlafaxine) suggests it is often taken with alcohol or other drugs during an overdose.

Ingredients

Allergens

FD&C colors

Inactive

colloidal silicon dioxidehypromellosemagnesium stearatemicrocrystalline cellulosepovidone K30sodium stearyl fumarateFD&C Red No. 40FD&C Yellow No. 6polyvinyl alcohol, unspecifiedpolyethylene glycol 1000talctitanium dioxide

Educational summary derived from FDA labeling, AI-assisted. Not medical advice — consult a healthcare professional. Updated 2026-04-25.