Brand Names: PMS-Diclofenac
Common Name: diclofenac
What is this drug used for?
Diclofenac belongs to the class of medications known as non-steroidal
anti-inflammatories (NSAIDs). It works by reducing pain,
swelling, and inflammation. The tablet and suppository are used to
relieve pain for people with rheumatoid
arthritis, osteoarthritis,
and degenerative joint diseases of the hip. The eye drop is used to reduce
eye inflammation before and after eye surgery (e.g., cataract
surgery) and in other cases of eye inflammation where infection is not
present.
Your doctor may choose to use this medication for conditions other than
the ones listed here. If you're unsure why you are taking this medication,
contact your doctor.
Is there any reason not to take this drug?
Diclofenac should not be taken by anyone who:
- currently has or recently had inflammatory diseases of the stomach
and intestines, such as stomach
or intestinal ulcer or ulcerative
colitis
- has significant liver impairment or liver
disease
- has severely impaired or deteriorating kidney function
- is currently taking other NSAIDs
- is or may be allergic to diclofenac or any of the ingredients of
the medication
- has had an allergic reaction to ASA
or other anti-inflammatory medications.
Suppositories should not be used by anyone who:
- has any inflammatory lesions of the rectum or anus
- has recently had rectal or anal bleeding
What about possible side effects?
The side effects listed below are not experienced by everyone who
takes this medication. If you are concerned about side effects, discuss
the risks and benefits of this medication with your health professional.
They may be able to help you to deal with some of the effects.
The following side effects may go away as your body becomes used to
the medicine; check with your doctor if the following side effects continue
or become bothersome. A common side effect of nonsteroidal anti-inflammatory
drugs (NSAIDs) is stomach upset. This can be minimized by taking the medication
immediately after a meal, or with food or milk.
More common
- abdominal or stomach cramps, pain, or discomfort (mild to moderate)
- diarrhea
- dizziness, drowsiness, or lightheadedness
- headache (mild to moderate)
- heartburn, indigestion, nausea, or vomiting
Less common or rare
- bitter taste or other change in taste sensation
- bloated feeling, gas, or constipation
- decreased appetite or loss of appetite
- fast or pounding heartbeat
- flushing or hot flashes
- general feeling of discomfort or illness
- increased sensitivity of eyes to light
- increased sweating
- irritation, dryness, or soreness of mouth
- nervousness, anxiety, irritability, trembling, or twitching
- rectal irritation (with suppositories)
- trouble sleeping
- unexplained weight loss
- unusual tiredness or weakness without any other symptoms
Contact your doctor as soon as possible if any of the following side
effects occur:
More common
- bleeding from rectum (with suppositories)
- skin rash
Less common or rare
- bladder pain
- bleeding from cuts or scratches that lasts longer than usual
- bleeding or crusting sores on lips
- bloody or cloudy urine or any problem with urination, such
as difficult, burning, or painful urination
- change in urine colour or odour
- frequent urge to urinate
- sudden, large increase or decrease in the amount of urine or
loss of bladder control
- blurred vision or any change in vision
- burning feeling in throat, chest, or stomach
- confusion, forgetfulness, mental depression, or other mood
or mental changes
- cough or hoarseness
- decreased hearing, any other change in hearing, or ringing
or buzzing in ears
- difficulty swallowing
- eye pain, irritation, dryness, redness, or swelling
- hallucinations
- headache (severe), throbbing, or with stiff neck or back
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- hives, itching of skin, or any other skin problem, such as blisters,
redness or other colour change, tenderness, burning, peeling,
loosening or splitting of fingernails
- muscle cramps, pain, or weakness
- numbness, tingling, pain, or weakness in hands or feet
- pain in lower back or side (severe)
- swelling or tenderness in upper abdominal or stomach area
- swelling of face, feet, or lower legs
- swelling of lips or tongue
- swollen or painful glands (especially in the neck or throat
area)
- thirst (continuing)
- difficulty speaking
- unexplained runny nose or sneezing
- unexplained, unexpected, or unusually heavy vaginal bleeding
- unusual tiredness or weakness
- weight gain (rapid)
- yellow eyes or skin
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Stop taking this medication and contact your doctor immediately if
any of the following side effects occur:
Rare
- abdominal or stomach pain, cramping, or burning (severe)
- bloody or black, tarry stools
- chest pain
- convulsions (seizures)
- fever with or without chills
- nausea, heartburn, or indigestion (severe and continuing)
- pinpoint-sized red spots on skin
- sores, ulcers, or white spots on lips or in mouth
- spitting up of blood
- unexplained nosebleeds
- unusual bleeding or bruising
- vomiting of blood or material that looks like coffee grounds
Stop taking this medication and get emergency help immediately if
any of the following side effects occur:
Rare
- fainting
- fast or irregular breathing
- fast, irregular heartbeat or pulse
- hive-like swellings (large) on face, eyelids, mouth, lips, or tongue
- puffiness or swelling of the eyelids or around the eyes
- shortness of breath, troubled breathing, wheezing, or tightness in
chest
Some people may experience side effects other than those listed.
Check with your doctor if you notice any symptom that worries you while
you are taking this medication.
What if I am taking other drugs?
The following medications may affect the way that diclofenac works
or increase the risk of side effects:
- ASA
- alcohol
- angiotensin converting enzyme (ACE) inhibitors (e.g., ramipril)
- beta-adrenergic blockers (e.g., metoprolol,
atenolol)
- cholestyramine
- corticosteroids (e.g., prednisone)
- diuretics (water pills; e.g., spironolactone)
- heparin
- other NSAIDs (e.g., naproxen,
indomethacin)
- potassium supplements
- sucralfate
- warfarin
Diclofenac may affect the way that the following medications work:
- cyclosporine
- digoxin
- heparin
- lithium
- methotrexate
- warfarin
If you are taking any of these medications, speak with your doctor
or pharmacist. Depending on your specific circumstances, your doctor
may want you to:
- stop taking one of the medications,
- change one of the medications to another,
- change how you are taking one or both of the medications, or
- leave everything as is.
An interaction between two medications does not always mean that
you must stop taking one of them. In many cases, interactions are
intended or are managed by close monitoring. Speak to your doctor about
how any drug interactions are being managed or should be managed.
Medications other than those listed above may interact with this
medication. Tell your doctor or prescriber about all prescription,
over-the-counter (non-prescription), and herbal medications that you are
taking. Also tell them about any supplements you take. Since caffeine,
decongestants, alcohol, the nicotine from cigarettes, or street drugs
can affect the action of many medications, you should let your prescriber
know if you use them.
Other information:
Fluid and electrolyte balance: Fluid retention and edema have
been reported with use of this medication. Diclofenac should be used with
caution by anyone who:
- has certain heart conditions (e.g., congestive
heart failure)
- has high blood
pressure
- has kidney disease
or reduced kidney function
- is recovering from a surgical operation under general anesthesia
- has any other condition that might lead to fluid retention
There is a risk of high blood potassium with NSAID treatment. Those
most at risk include seniors, those with conditions such as diabetes
or kidney failure,
and those taking beta-adrenergic blockers, angiotensin converting enzyme
(ACE) inhibitors, or some diuretics (water pills).
Gastrointestinal: Stomach
ulcers, perforation, and bleeding from the stomach have been known
to occur during therapy with diclofenac. These complications can occur
at any time, and are sometimes severe enough to require immediate medical
attention. The risk of ulcers and bleeding are increased for people taking
higher doses of NSAIDs for longer periods of time.
Diclofenac should be taken under close medical supervision by people
prone to irritation of the stomach and intestines, particularly those
who have had a stomach ulcer, bloody stools, or diverticulosis
or other inflammatory disease of the stomach or intestines (such as ulcerative
colitis or Crohn's
disease). In these cases, your doctor must weigh the benefits of treatment
against the possible risks.
Stop taking the medication and contact your doctor immediately if you
experience symptoms or signs suggestive of stomach ulcers or bleeding
in the stomach (black, tarry stools). These reactions can occur at any
time during treatment without warning.
Kidney function: Long-term use of diclofenac may lead to a higher
risk of reduced kidney function. This is most common for people who already
have kidney disease,
liver disease,
or heart failure; for people
who are take diuretics (water pills); and for seniors.
Occupational hazards: Some people have reported headache, dizziness,
lightheadedness, and confusion while taking this medication. Avoid operating
motor vehicles and doing other potentially hazardous activities until
you have determined the effect this medication has on you.
Pregnancy: This medication is not recommended for use during pregnancy
as its safety has not been established.
Breast-feeding: This medication should not be used by nursing
mothers.
Children: Diclofenac is not recommended for children under 16
years of age. The safety, effectiveness, and dosage of this medication
for this age group have not been established.
Seniors: Seniors appear to have a higher risk of side effects
with this medication. The lowest effective dosage should be used under
close medical supervision.
Special Instructions:
Tablets: The usual adult dosage ranges from 75 mg to 150 mg daily. The immediate release tablets are taken in three equally divided doses with food, while the long-acting (sustained release, or SR) tablets are taken in 1 or 2 daily doses with food or milk. The maximum recommended daily dose of diclofenac is 150 mg.
Suppositories: The suppositories are usually used as a substitute for the last daily dose in a 50 mg or 100 mg strength, to a maximum total daily dose of 150 mg of diclofenac.
Eye drops: For inflammation, it is recommended that one drop be put into the eye 4 to 5 times daily. For surgery, the eye drops are used as follows:
- in the 3 hours before the surgery, one drop is put into the eye up to a maximum of 5 times
- in the first 45 minutes after surgery, one drop is put into the eye every 15 minutes
- subsequently, one drop may be put into the eye 3 to 5 times daily as needed
Many things can affect the dose of medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor.
It is important that this medication be taken exactly as prescribed by your doctor. If you miss a dose, take it as soon as possible and continue with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one.
This medication is available under multiple brand names and in several different forms. Any specific brand name of this medication may not be available in all of the forms listed here. The forms available for the specific brand you have searched are listed under "What form(s) does this medication come in?"
Do not dispose of medications in wastewater (e.g. down the sink or in the toilet) or in household garbage. Ask your pharmacist how to dispose of medications that are no longer needed or have expired.
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