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Act Fluoxetine: Uses, Side Effects and Dosage

Updated:
Facts
Status:
Prescription (Rx)
Strength:
10 mg, 20 mg, 40 mg
ATC code:

Patient Medication Information: uses, side effects, how to take - Act Fluoxetine

What is ACT FLUOXETINE used for?

ACT FLUOXETINE is used to relieve your symptoms of:

  • Depression (feeling sad, a change in appetite or weight, difficulty concentrating or sleeping, feeling tired, headaches, unexplained aches and pain)
  • Bulimia (an eating disorder where you force yourself to vomit after eating)
  • Obsessive-compulsive disorder (recurrent and intrusive thoughts, feelings, ideas, or sensations; recurrent pattern of behaviour, or unwanted thoughts or actions)

How does ACT FLUOXETINE work?

ACT FLUOXETINE belongs to a group of medicines called selective serotonin reuptake inhibitors (SSRIs). ACT FLUOXETINE is thought to work by increasing the levels of a chemical in the brain called serotonin. This helps to relieve your symptoms of depression, bulimia and/or obsessive-compulsive disorder.

What are the ingredients in ACT FLUOXETINE?

Medicinal ingredients: fluoxetine hydrochloride.

Non-medicinal ingredients:

ACT FLUOXETINE 10 mg capsules contain: pregelatinized starch. The capsule shell contains Black Iron Oxide, FD&C Yellow #6, FD&C Blue #1, D&C Yellow #10, titanium dioxide and gelatin.

ACT FLUOXETINE 20 mg capsules contain: pregelatinized starch. The capsule shell contains FD&C Yellow #6, D&C Yellow #10, FD&C Blue #1, titanium dioxide and gelatin.

ACT FLUOXETINE 40 mg capsules contain: pregelatinized starch. The capsule shell contains FD&C Blue #1, titanium dioxide and gelatin.

ACT FLUOXETINE comes in the following dosage forms:

Capsules; 10 mg, 20 mg and 40 mg

Do not use ACT FLUOXETINE if:

  • you are allergic to fluoxetine hydrochloride or to any of the non-medicinal ingredients in ACT FLUOXETINE (see What are the ingredients in ACT FLUOXETINE:).
  • you are currently or have recently taken the drug thioridazine.
  • you are currently or have recently taken any monamine oxidase anti-depressants such as phenelzine sulphate, moclobemide, linezolid. If you are unsure, ask your healthcare professional.

To help avoid side effects and ensure proper use, talk to your healthcare professional before you take ACT FLUOXETINE. Talk about any health conditions or problems you may have, including if you:

  • have anorexia
  • have bipolar disorder
  • have ever had an allergic reaction to any medication
  • have QT/QTc prolongation or a family history of QT/QTc prolongation
  • have a heart disease
  • have a personal history of fainting spells
  • have a family history of sudden cardiac death at less than 50 years of age
  • have electrolyte disturbances (e.g., low blood potassium or magnesium levels) or conditions that could lead to electrolyte disturbances (e.g., vomiting, diarrhea, dehydration)
  • have or have a history of a bleeding disorder or have been told that you have low platelets
  • have or have a history of liver or kidney problems
  • have or have a history of seizures
  • have diabetes
  • had a recent bone fracture or were told you have osteoporosis or risk factors for osteoporosis
  • are pregnant, thinking about becoming pregnant, or if you are breast feeding
  • drink alcohol and /or use street drugs

Other warnings you should know about:

During treatment with ACT FLUOXETINE, it is important that you and your doctor talk regularly about how you are feeling.

Do NOT stop taking ACT FLUOXETINE without talking to your healthcare professional first, as it may cause unwanted side effects such as headache, insomnia, numbness, tingling, burning, or prickling, nervousness, anxiety, nausea, sweating, dizziness, jitteriness and weakness.

New or worsened emotional or behavioural problems: When you first start taking ACT FLUOXETINE or when your dose is adjusted, you may feel worse instead of better. You may feel new or worsened feelings of agitation, hostility, anxiety, or impulsivity, Do NOT stop taking your medicine, it takes time for ACT FLUOXETINE to work.

Self-harm: If you have thoughts of harming or killing yourself at any time, contact your doctor or go to a hospital right away. You may find it helpful to tell a relative or close friend that you are depressed or have other mental illnesses. Ask them to read this leaflet. You might ask them to tell you if they:

  • think your depression or mental illness is getting worse, or
  • are worried about changes in your behaviour

Pregnancy: Only take ACT FLUOXETINE during pregnancy if you and your doctor have discussed the risks and have decided that you should. If you take ACT FLUOXETINE near the end of your pregnancy, you may be at a higher risk of heavy vaginal bleeding shortly after birth. If you become pregnant while taking ACT FLUOXETINE, tell your doctor right away.

Effects on newborns: In some cases, babies born to a mother taking ACT FLUOXETINE during pregnancy may require hospitalization, breathing support and tube feeding. Be ready to seek medical help for your newborn if they:

  • Have trouble breathing or feeding,
  • Have muscle stiffness, or floppy muscles (like a rag doll)
  • Have seizures (fits)
  • Are shaking (jitteriness)
  • Are constantly crying

If you take ACT FLUOXETINE:

  • During early pregnancy, there is a possible slight increased risk that your newborn may have a heart defect.
  • During late pregnancy, your newborn may be at risk of having a serious lung condition called Persistent Pulmonary Hypertension of the Newborn (PPHN), which causes breathing problems.

Falls: ACT FLUOXETINE can cause you to feel sleepy or dizzy and can affect your balance. This increases your risk of falling, which can cause fractures or other fall related-injuries, especially if you:

  • Take sedatives
  • Consume alcohol
  • Are elderly
  • Have a condition that causes weakness or frailty

Driving and using machines: ACT FLUOXETINE may make you feel sleepy. Give yourself time after taking ACT FLUOXETINE to see how you feel before driving a vehicle or using machinery.

ACT FLUOXETINE can cause serious side effects including:

  • Angle-closure glaucoma (sudden eye pain)
  • Heart rhythm problems

See the Serious side effects and what to do about them table below for more information on these and other serious side effects.

Tell your healthcare professional about all the medicines you take, including any drugs, vitamins, minerals, natural supplements or alternative medicines.

The following may interact with ACT FLUOXETINE:

Serious Drug Interactions

Do not use ACT FLUOXETINE if you are taking or have recently taken:

  • Monoamine oxidase inhibitor (e.g., phenelzine, tranylcypromine, moclobemide or selegiline, linezolid, methylene blue)
  • Thioridazine.
  • drugs that affect how your heart beats such as quinidine, procainamide, disopyramide, amiodarone, sotalol, ibutilide, dronedarone, flecainide, propafenone
  • drugs used to manage psychosis (antipsychotics) such as chlorpromazine, pimozide, haloperidol, droperidol, ziprasidone, clozapine
  • drugs used to treat depression such as citalopram, venlafaxine, amitriptyline, imipramine, maprotiline, desipramine
  • opioids and pain killers such as methadone, tramadol, fentanyl, tapentadol, meperidine, pentazocine
  • drugs to treat bacterial infections such as erythromycin, clarithromycin, telithromycin, tacrolimus, moxifloxacin, levofloxacin, ciprofloxacin
  • drugs used to treat fungal infections such as ketoconazole, fluconazole, voriconazole
  • drugs used to treat malaria such as quinine, chloroquine
  • drugs used to treat nausea and vomiting such as domperidone, dolasetron, ondansetron
  • drugs used in cancer therapy such as vandetanib, sunitinib, nilotinib, lapatinib, vorinostat, tamoxifen
  • drugs used to treat asthma such as salmeterol, formoterol
  • drugs that affect your electrolyte levels such as diuretics (“water pills”), laxatives and enemas, amphotericin B, high dose corticosteroids (drugs that reduce inflammation)
  • drugs that can affect how your blood clots such as warfarin, acetylsalicylic acid (Aspirin), non-steroidal anti-inflammatory drugs (NSAIDs)
  • lithium, a drug used to treat bipolar disorder
  • benzodiazepines such as diazepam, alprazolam
  • drugs used to treat seizures such as carbamazepine, phenytoin
  • drugs used to treat cough such as dextromethorphan
  • tryptophan, a drug used to treat anxiety or used as a sleep aid
  • sumatriptan, a drug used to treat migraines
  • herbal medicines such as St. John’s Wort
  • alcohol

How to take ACT FLUOXETINE:

  • It is very important that you take ACT FLUOXETINE exactly as your doctor has instructed.
  • ACT FLUOXETINE may be taken with or without food.

  • Swallow the capsules whole; do not chew or open them.
  • Continue to take your medicine even if you do not feel better, as it may take a number of weeks for your medicine to start working.
  • Keep taking your ACT FLUOXETINE until the doctor tells you to stop.

Remember, this medicine has been prescribed only for you. Do not give it to anybody else, as they may experience undesirable effects, which may be serious.

Usual dose:

Depression

Usual initial dose: 20 mg a day in the morning. Maximum dose: 60 mg a day.

Bulimia

60 mg a day.

Obsessive-Compulsive Disorder

20 mg to 60 mg a day.

Overdose:

If you think you, or a person you are caring for, have taken too much ACT FLUOXETINE, contact a healthcare professional, hospital emergency department, or regional poison control centre immediately, even if there are no symptoms.

Missed Dose:

If you forget to take a dose of ACT FLUOXETINE, take it as soon as you remember. If it is almost time to take your next dose, skip the missed dose and take your next dose at the scheduled time. Do not try to make up for a missed dose by taking a double dose the next time.

What are possible side effects from using ACT FLUOXETINE?

These are not all the possible side effects you may have when taking ACT FLUOXETINE. If you experience any side effects not listed here, tell your healthcare professional.

  • nausea
  • dizziness
  • headache
  • anxiety
  • nervousness
  • drowsiness
  • insomnia (difficulty falling or staying asleep)
  • fatigue
  • weakness
  • tremors (shaking)
  • light-headedness
  • diarrhea
  • upset stomach
  • indigestion
  • dry mouth
  • loss of appetite
  • excessive sweating
  • rash or itchy skin
  • low sex drive
  • weight gain or loss

Serious side effects and what to do about them

Symptom / effectTalk to your healthcare professionalStop taking drug and get immediate medical help
Only if severeIn all cases
COMMON

Allergic Reaction: difficulty

swallowing or breathing, wheezing, feeling sick to your stomach and

throwing up, hives or rash, swelling of the face, lips, tongue or throat.

√

Allergic reactions (skin rash, hives

alone)

√
Anorexia (an eating disorder): extremely low body weight, not eating, obsession with food, calories and dieting, excessive exercise√
UNCOMMON

Akathisia (a type of movement

disorder): feeling restless, unable to sit or stand still

√

Hallucinations (seeing or hearing

things that are not there)

√

Mania: elevated or irritable mood,

decreased need for sleep, racing thoughts

√

Seizures (fits): uncontrollable

shaking with or without loss of consciousness

√

Urinary retention (inability to pass

urine or to empty the bladder):

pain

√
RARE

Angle-closure glaucoma (sudden

eye pain): increased pressure in your eyes, eye and head pain, swelling or redness in or around the eye, hazy or blurred vision, sudden loss of sight

√

Gastrointestinal Bleeding (bleeding in the stomach or bowels): black, tarry stool, blood in

the stool

√

Serious side effects and what to do about them

Symptom / effectTalk to your healthcare professionalStop taking drug and get immediate medical help
Only if severeIn all cases

Heart rhythm problems: dizziness,

palpitations (rapid, pounding, or

irregular heartbeat), fainting or seizures

√

Hyponatremia (low sodium in the

blood): lethargy, confusion, muscular twitching, achy, stiff or uncoordinated muscles, seizure, coma

√

Liver Disorder: yellowing of the skin or eyes, dark urine and pale stools, abdominal pain, nausea,

vomiting, loss of appetite

√
Uncontrollable movements of the body or face√
VERY RARE

Serotonin Syndrome: agitation,

hallucinations, confusion, or other

changes in mental status;

coordination problems, uncontrolled muscle spasms, or muscle twitching (overactive reflexes); restlessness, shivering, racing or fast heartbeat, high or low blood pressure, sweating or fever, nausea, vomiting, or diarrhea, stiff muscles, tremor, loss of muscle control

√
UNKNOWN

Increase in the hormone prolactin:

In women: breast discomfort, leakage of milk from the breasts, missed periods, or other problems with your menstrual cycle.

In men: decreased body and facial hair, breast swelling, difficulty in getting or maintaining erections, or

other sexual dysfunction

√
New or worsened emotional or behavioural problems√

Thrombocytopenia (low blood platelets): bruising or bleeding for longer than usual if you hurt

yourself, fatigue and weakness

√

If you have a troublesome symptom or side effect that is not listed here or becomes bad enough to interfere with your daily activities, tell your healthcare professional.

Reporting Side Effects

You can report any suspected side effects associated with the use of health products to Health Canada by:

  • Visiting the Web page on Adverse Reaction Reporting (https://www.canada.ca/en/health-canada/services/drugs-health-products/medeffect-canada/adverse-reaction-reporting.html) for information on how to report online, by mail or by fax; or
  • Calling toll-free at 1-866-234-2345.

NOTE: Contact your health professional if you need information about how to manage your side effects. The Canada Vigilance Program does not provide medical advice.

Storage:

  • Store ACT FLUOXETINE in its original package at room temperature (15°C to 25°C), in a dry place and out of direct sunlight.
  • Do not use the medicine after the expiry date printed on the package label.
  • If your doctor tells you to stop taking ACT FLUOXETINE or you find that the capsules have passed their expiry date, please return any leftover medicine to your pharmacist.

Keep out of reach and sight of children.

If you want more information about ACT FLUOXETINE:

  • Talk to your healthcare professional
  • Find the full product monograph that is prepared for healthcare professionals and includes this Patient Medication Information by visiting the Health Canada website: (https://www.canada.ca/en/health-canada/services/drugs-health-products/drug- products/drug-product-database.html); the manufacturer’s website www.drreddys.com, or by calling 1-855-845-1739.

This leaflet was prepared Dr. Reddy’s Laboratories Inc.

Manufactured by:

Dr. Reddy’s Laboratories Inc.,

107 College Road East,

Princeton, New Jersey, 08540

USA

Imported and Distributed by:

Dr. Reddy's Laboratories Canada Inc.,

Mississauga, ON L4W 4Y1

Canada

Last revised: November 07, 2022

About this document

Source: Health Canada – Drug Product Database (DPD) and product monographs · DIN (Drug Identification Number): 02242177

Revision date stated in the text: November 7, 2022

Found a mistake? Write to us via the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Drug information for Act Fluoxetine

Rx or OTC
Prescription (Rx)?
DIN 02242177, 02242178, 02244694
Schedule(s) PRESCRIPTION
Active ingredient(s) Fluoxetine (fluoxetine hydrochloride)
Dosage form(s) Capsule
Route(s) of administration Oral
Drug class (WHO ATC)
  1. N Nervous system drugs
    1. N06 Psychoanaleptics
      1. N06A Antidepressants
        1. N06AB Selective serotonin reuptake inhibitors
          1. N06AB03 Fluoxetine
Company DR. REDDY'S LABORATORIES INC
Strengths and forms
DIN Strength Dosage form(s) Current status
02242177 10 MG Capsule Cancelled Post Market June 27, 2023
02242178 20 MG Capsule Cancelled Post Market June 27, 2023
02244694 40 MG Capsule Cancelled Pre Market June 27, 2023

Source: Health Canada – Drug Product Database (DPD) and product monographs, data as of November 1, 2026. Data from the Health Canada Drug Product Database, as published there. Not a substitute for the advice of a doctor or pharmacist.