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D Fax LS 100 Tablet SR

D Fax LS 100 Tablet SR is a prescription medicine containing clonazepam and desvenlafaxine, used to help manage depression with anxiety, panic symptoms, or related mood disturbance. Desvenlafaxine helps balance key brain chemicals linked to mood, while clonazepam provides calming support by reducing overactive nerve activity in the brain. This combination is used only under medical supervision because it can cause drowsiness, dependence, withdrawal symptoms if stopped suddenly, and other serious side effects if not used correctly.

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Written by: Srishti Bhukta, B. Pharma

Reviewed by: Dr. Sekh Addil, MBBS

Last updated on: 13-05-2026

D Fax LS 100 Tablet SR
D Fax LS 100 Tablet SR

Alteus Biogenics Pvt. Ltd.

Strip of 10 tablets
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WHO GMP Certified

Long Expiry (>8 Months)

15 Days Easy Returns

General Information

Approved by
FDA
Regulated by
NPPA
Doctor Approved & Trusted
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Genuine Medicine

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Detailed Description

D Fax LS 100 Tablet SR is a combination medicine that brings together desvenlafaxine, an SNRI antidepressant, and clonazepam, a benzodiazepine. Desvenlafaxine works by increasing the levels of serotonin and norepinephrine in the brain, which can help improve mood, reduce anxiety, and support emotional stability. Clonazepam works by enhancing the calming effect of gamma-aminobutyric acid (GABA), helping to reduce excessive nerve activity, panic, restlessness, and physical tension. Together, these ingredients may provide both antidepressant and anti-anxiety benefits when prescribed appropriately.

This medicine should be taken only under medical supervision. Your doctor will decide the correct dose and duration based on your condition, age, response to treatment, and any other medicines you may be taking. It may be taken with or without food unless your doctor advises otherwise.

Benefits may begin gradually, and early symptom relief may be helped by the calming action of clonazepam while desvenlafaxine continues to work on mood over time. Extra care is needed if you have seizure disorders, bipolar disorder, glaucoma, liver or kidney problems, or if you take alcohol, opioids, or other medicines that affect the brain, because these may increase the risk of side effects or interactions.

Although D Fax LS 100 Tablet SR does not cure depression or anxiety, it can help manage symptoms and improve daily functioning when used correctly. By combining antidepressant action with short-term calming support, it may reduce worry, panic, low mood, and related distress in suitable patients.

Uses of D Fax LS 100 Tablet SR

D Fax LS 100 Tablet SR is typically indicated by a doctor for

Depression

To help improve low mood, loss of interest, and related emotional symptoms.

Anxiety with depression

To support people who have both depressed mood and significant anxiety symptoms.

Panic symptoms

To help reduce sudden episodes of intense fear, restlessness, and physical tension.

Short-term symptom control

To provide calming support while the antidepressant component begins to work.

Benefits of D Fax LS 100 Tablet SR

D Fax LS 100 Tablet SR may help improve emotional well-being and daily functioning by targeting mood and anxiety together. Desvenlafaxine can help correct chemical imbalances associated with depression, while clonazepam can reduce short-term anxiety, nervousness, and panic-related distress. This combined action may make it easier for some patients to feel calmer, sleep better, and cope more comfortably during treatment.

When used correctly under medical supervision, it may also help reduce the intensity of physical anxiety symptoms such as restlessness, muscle tension, and racing thoughts.

Side Effects of D Fax LS 100 Tablet SR

D Fax LS 100 Tablet SR may cause side effects, although not everyone will experience them. Most reactions are mild and temporary, but some can be more serious and require medical attention.

Common Side Effects

These are usually mild and often improve as your body adjusts:

  • Drowsiness or sleepiness
  • Dizziness or light-headedness
  • Nausea or stomach discomfort
  • Dry mouth
  • Fatigue or weakness
  • Sweating
  • Headache
Uncommon Side Effects
  • These may occur less often but can still affect some patients:
  • Blurred vision
  • Tremor or shakiness
  • Constipation
  • Sleep disturbance
  • Increased blood pressure
  • Mood changes or irritability
Serious Side Effects (Require Immediate Medical Attention)
  • Although rare, these reactions can be serious. Contact your doctor right away if you notice:
  • Difficulty breathing or extreme sleepiness
  • Severe confusion or loss of coordination
  • Serotonin syndrome, which may cause fever, agitation, rapid heartbeat, sweating, or muscle stiffness
  • Severe allergic reaction, such as swelling of the face or throat, difficulty breathing, or a widespread rash
  • Worsening depression or suicidal thoughts
  • Withdrawal symptoms if the medicine is stopped suddenly, including anxiety, tremors, or seizures

Directions for Use

  • Take D Fax LS 100 Tablet SR exactly as suggested by your doctor, based on your health condition, age, and other medicines you may be using.
  • It is usually taken once daily, with or without food, unless your doctor gives different instructions.
  • Try to take the dose at the same time each day to maintain consistency.
  • Swallow the medicine whole with water; do not crush or chew unless your doctor advises otherwise.
  • Do not change the dose or frequency on your own. Always follow medical advice.
  • Do not stop D Fax LS 100 Tablet SR suddenly, because clonazepam may cause withdrawal symptoms, and desvenlafaxine may also need gradual dose reduction.

How it works

  • D Fax LS 100 Tablet SR combines two active ingredients, desvenlafaxine and clonazepam, that work through different but complementary pathways to support mood and anxiety control.
  • Desvenlafaxine: A serotonin and norepinephrine reuptake inhibitor (SNRI) that helps increase the levels of serotonin and norepinephrine in the brain. This can improve mood, reduce anxiety, and support emotional balance.
  • Clonazepam: A benzodiazepine that enhances the calming effect of gamma-aminobutyric acid (GABA) in the brain. This helps reduce excessive nerve activity, panic, restlessness, and physical tension.
  • Together, these ingredients provide a dual-action approach: long-term mood support from desvenlafaxine and short-term calming support from clonazepam. This combination may help reduce anxiety, panic symptoms, and low mood when used exactly as prescribed.

Safety Advice for D Fax LS 100 Tablet SR

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Pregnancy
Caution

Clonazepam and desvenlafaxine should only be used in pregnancy if the expected benefit is greater than the risk. Both medicines may affect the baby, especially with use later in pregnancy, so medical supervision is important.

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Breastfeeding
Caution

Both medicines can pass into breast milk and may cause sleepiness, poor feeding, or irritability in the baby. Your doctor will decide whether D Fax LS 100 Tablet SR is appropriate while breastfeeding.

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Driving
Unsafe

D Fax LS 100 Tablet SR may cause drowsiness, dizziness, slowed reaction time, or poor concentration. Do not drive or use machinery until you know how it affects you.

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Liver
Caution

Clonazepam and desvenlafaxine are processed in the body, and people with liver disease may need closer monitoring or dose adjustment. Use only under medical advice.

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Kidney
Caution

Desvenlafaxine is cleared through the kidneys, so kidney impairment may require dose adjustment or closer supervision.

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Alcohol
Unsafe

Alcohol can increase drowsiness, dizziness, and the risk of impaired judgment or breathing problems when taken with D Fax LS 100 Tablet SR.

Quick Tips for D Fax LS 100 Tablet SR

  • For best results, take D Fax LS 100 Tablet SR exactly as prescribed and at the same time each day. Do not change the dose or stop it suddenly without your doctor’s advice, because sudden changes may cause withdrawal symptoms or worsening of your condition.
  • D Fax LS 100 Tablet SR can be taken with or without food. If it causes nausea or stomach upset, taking it with a meal may help.
  • Avoid alcohol while taking D Fax LS 100 Tablet SR. Alcohol can increase drowsiness, dizziness, and the risk of impaired judgment, falls, or breathing problems.
  • Be careful with activities that need alertness, such as driving or operating machinery, until you know how D Fax LS 100 Tablet SR affects you. It may cause sleepiness, slowed reactions, or poor concentration.
  • If you have a history of depression, suicidal thoughts, seizures, glaucoma, liver disease, kidney disease, or substance use disorder, tell your doctor before using D Fax LS 100 Tablet SR. Extra monitoring may be needed.

Storage Advice

  • Store at room temperature in a cool, dry place away from direct sunlight, heat, and moisture.
  • Keep the container tightly closed and out of the reach of children.
  • Do not use the medicine after the expiry date, and keep it in its original container when possible.

Drug-Food Interaction

  • Meals (MILD): D Fax LS 100 Tablet SR can be taken with or without food. Food does not usually change how it works, but it may help reduce stomach upset.
  • Alcohol (SEVERE): Avoid alcohol completely. Combining alcohol with D Fax LS 100 Tablet SR can increase sedation and the risk of dangerous side effects.
  • Caffeine (MILD): Caffeine may make anxiety symptoms feel worse in some people, which can make it harder to judge how well D Fax LS 100 Tablet SR is working.

Interactions with Other Drugs

Tell your doctor about all prescription medicines, over-the-counter products, and supplements before starting D Fax LS 100 Tablet SR.

  • Opioid pain medicines (SEVERE): Combining clonazepam with opioids can cause profound sleepiness, slowed breathing, coma, or death.
  • Other sedatives or sleep medicines (CAUTION): Medicines that cause drowsiness may increase the sedating effects of D Fax LS 100 Tablet SR.
  • Other antidepressants, triptans, or serotonin-raising medicines (CAUTION): These may raise the risk of serotonin syndrome when used with desvenlafaxine.
  • MAO inhibitors (SEVERE): Do not use with or soon after an MAOI unless your doctor specifically instructs you to.
  • Blood pressure medicines (CAUTION): Desvenlafaxine may affect blood pressure in some people, so monitoring may be needed if you are on antihypertensive treatment.

Drug-Disease Interactions

  • Depression or suicidal thoughts (CAUTION): Tell your doctor right away if your mood worsens or if you have thoughts of self-harm.
  • Seizure disorders (CAUTION): Clonazepam should not be stopped suddenly, because withdrawal may trigger seizures or other symptoms.
  • Liver impairment (CAUTION): People with liver disease may need closer monitoring or a different treatment plan.
  • Kidney impairment (CAUTION): Kidney problems can affect desvenlafaxine handling, so medical supervision is important.
  • Glaucoma (CAUTION): Use only under medical advice if you have eye pressure problems, especially narrow-angle glaucoma.

Overdose

Taking too much D Fax LS 100 Tablet SR may cause severe drowsiness, confusion, vomiting, dizziness, slowed breathing, or loss of consciousness.

If overdose is suspected, seek emergency medical help right away. Do not wait for symptoms to improve on their own.

What If You Forget to take D Fax LS 100 Tablet SR?

  • If you miss a dose, take it as soon as you remember.
  • If it is almost time for your next dose, skip the missed dose and return to your regular schedule.
  • Do not take a double dose to make up for the missed one.

FAQ

Fact Box

Therapeutic Class

Anti-anxiety medicine / Antidepressant medicine

Action Class

Central nervous system depressant, anxiolytic, anticonvulsant, and antidepressant

Chemical Class

Combination of a benzodiazepine (Clonazepam) and a serotonin-norepinephrine reuptake inhibitor ( SNRI ) (Desvenlafaxine)

Habit Forming

Yes, clonazepam may cause dependence with prolonged or unsupervised use.

Disclaimer

PlatinumRx is committed to providing reliable and accurate information to support informed customer decisions. However, all information made available on the Platform, including product descriptions, comparisons, and other content, is provided solely for general informational purposes. Such information is not intended to diagnose, prevent, treat, or cure any medical condition, nor should it be relied upon as a substitute for professional medical advice, diagnosis, or treatment.

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