Consumer Information for: GD-VENLAFAXINE XR
Consumer Information
Information about the product including what the product is used for, dosage, warnings, proper use and side effects. This summary will not tell you everything about the product. Contact your healthcare professional if you have any questions about the product.
What the medication is used for
GD-venlafaxine XR has been prescribed to you by your doctor to relieve your symptoms of the following conditions:
- Depression (feeling sad, a change in appetite or weight, difficulty concentrating or sleeping, feeling tired, headaches, unexplained aches and pain)
- Generalized anxiety or nervousness
- Social phobia (social anxiety disorder) – avoidance and/or fear of social situations
- Panic disorder (repeated, unexpected panic attacks)
What it does
GD-venlafaxine XR belongs to a group of medicines called antidepressants. GD-venlafaxine XR is thought to work by affecting two naturally occurring brain chemicals, serotonin and norepinephrine.
When it should not be used
- Do not use GD-venlafaxine XR if you are allergic to it or to any of the components of its formulation (see list of components at the end of this section). Stop taking the drug and contact your doctor immediately if you experience an allergic reaction or any severe or unusual side effects.
- Do not use GD-venlafaxine XR if you are currently taking or have recently taken monoamine oxidase inhibitor antidepressants (e.g. phenelzine sulphate, moclobemide).
What the medicinal ingredient is
Venlafaxine Hydrochloride
What the non-medicinal ingredients are
Black Iron Oxide NF**, Ethylcellulose NF, Gelatin NF,
Hydroxypropyl-methylcellulose USP, Microcrystalline cellulose
NF, Opacode Red Print S-15094/95****, Red Iron Oxide*, Talc,
Titanium Dioxide*, White Ink TekPrint SB-0007P***, Yellow
Iron Oxide*.
* Present (in capsule) in all strengths
** Present (in capsule) in 37.5 mg strength only
*** 150 mg strength
**** 37.5 and 75 mg strengths
What dosage form it comes in
GD-venlafaxine XR is available in extended release capsules containing 37.5 mg (grey and peach), 75 mg (peach) and 150 mg (dark orange) venlafaxine.
Warnings and precautions
During treatment with these types of medication it is
important that you and your doctor have good ongoing
communication about how you are feeling.
GD-venlafaxine XR is not for use in children under 18 years of
age.
New or Worsened Emotional or Behavioural Problems
Particularly in the first few weeks or when doses are adjusted, a
small number of patients taking drugs of this type may feel
worse instead of better.T hey may experience new or worsened
feelings of agitation, hostility, anxiety, impulsivity or about
suicide, self-harm or harm to others. Suicidal thoughts and
actions can occur in any age group but may be more likely in
patients 18 to 24 years old. Should this happen to you, or to
those in your care, consult your doctor immediately. Close
observation by a doctor is necessary in this situation. Do not
discontinue your medication on your own.
You may be more likely to think like this if you have previously
had thoughts about harming yourself.
You may find it helpful to tell a relative or close friend that you
are depressed or have an anxiety disorder, and ask them to read
this leaflet. You might ask them to tell you if they think your
depression or anxiety is getting worse, or if they are worried
about changes in your behaviour.
Taking GD-Venlafaxine XR may increase your risk of breaking
a bone if you are elderly or have osteoporosis or have other
major risk factors for breaking a bone. You should take extra
care to avoid falls especially if you get dizzy or have low blood
pressure.
Before taking GD-venlafaxine XR tell your doctor or
pharmacist:
- if you have ever had any allergic reaction to medications, food, etc;
- all your medical conditions, including a history of seizures, liver disease, kidney disease, heart problems or high cholesterol
- if you have a bleeding disorder or have been told that you have low platelets.
- if you have blood pressure problems;
- any medications (prescription or non-prescription) which you are taking, especially monoamine oxidase (MAO) inhibitors (e.g. phenelzine sulfate, tranylcypromine sulfate, moclobemide or selegeline) or any other antidepressants, weight-loss medication, sleeping pills, antianxiety drugs, or medication to control blood pressure;
- if you are pregnant or thinking about becoming pregnant, or if you are breast feeding;
- your habits of alcohol and/or street drug consumption;
- any natural or herbal products you are taking (e.g., St. John’s Wort).
- if you had a recent bone fracture or were told you have osteoporosis or risk factors for osteoporosis.
- if you drive a vehicle or perform hazardous tasks during your work.
Discontinuing GD-venlafaxine XR
It is very important that you do NOT stop taking these
medications without first consulting your doctor. See SIDE
EFFECTS AND WHAT TO DO ABOUT THEM section for
more information.
Effects on Pregnancy and Newborns
Post-marketing reports indicate that some newborns whose
mothers took an SSRI (selective serotonin reuptake inhibitor) or
other newer anti-depressants, such as GD-venlafaxine XR,
during pregnancy have developed complications at birth
requiring prolonged hospitalization, breathing support and tube
feeding. Reported symptoms included feeding and/or breathing
difficulties, seizures, tense or overly relaxed muscles, jitteriness
and constant crying.
In most cases, the SSRI or other newer anti-depressant was taken
during the third trimester of pregnancy. These symptoms are
consistent with either a direct adverse effect of the antidepressant
on the baby, or possibly a discontinuation syndrome
caused by sudden withdrawal from the drug. These symptoms
normally resolve over time. However, if your baby experiences
any of these symptoms, contact your doctor as soon as you can.
If you are pregnant and taking an SSRI, or other newer antidepressant,
you should discuss the risks and benefits of the
various treatment options with your doctor. It is very important
that you do NOT stop taking these medications without first
consulting your doctor. See SIDE EFFECTS AND WHAT TO
DO ABOUT THEM section for more information.
Angle-closure Glaucoma
GD-venlafaxine XR can cause an acute attack of glaucoma. Having your eyes examined before you take GD-venlafaxine XR could help identify if you are at risk of having angle-closure glaucoma. Seek immediate medical attention if you experience:
- eye pain
- changes in vision
- swelling or redness around the eye
Interactions with this medication
Do not use GD-venlafaxine XR if you are taking or have
recently taken monoamine oxidase inhibitors.
You should avoid taking St. John’s Wort if you are taking GD-venlafaxine
XR.
Certain laboratory results may be affected by use of GD-venlafaxine
XR, discuss with your doctor if you receive any
unusual lab reports.
You should tell your doctor if you are taking or have recently
taken any medications (prescription, non-prescription or
natural/herbal), especially:
- other antidepressants, such as SSRIs and certain tricyclics
- other drugs that affect serotonin such as, lithium, linezolid, sibutramine, tryptophan, triptans used to treat migraines
- certain medicines used to treat pain, such as fentanyl (used in anaesthesia or to treat chronic paint), tramadol, tapentadol, meperidine, methadone, pentazocine
- certain medicines used to treat cough, such as dextromethorphan
- certain medicines used to treat schizophrenia
- certain medicines used to treat bipolar depression, such as lithium
- metoprolol or other medications used to treat high blood pressure and angina
- certain medicines which may affect blood clotting and increase bleeding, such as oral anti-coagulants (e.g. warfarin, dabigatran), acetylsalicylic acid (e.g. Aspirin)), and other non-steroidal anti-inflammatory drugs (e.g. ibuprofen)
- certain medicines used to treat epilepsy
- cimetidine
- In general, drinking alcoholic beverages should be kept to a minimum or avoided completely while taking GD-venlafaxine XR.
- Ketoconazole.
Proper use of this medication
Usual dose
- It is very important that you take GD-venlafaxine XR exactly as your doctor has instructed.
- Never increase or decrease the amount of GD-venlafaxine XR you, or those in your care if you are a caregiver or guardian, are taking unless your doctor tells you to and do not stop taking this medication without consulting your doctor.
- As with all antidepressants improvement with GD-venlafaxine XR is gradual. You may not have noticeable effect in the first few days of treatment. Some symptoms may begin to improve within about 2 weeks but significant improvement can take several weeks.
- GD-venlafaxine XR should be taken once a day with food, as prescribed; do not divide, crush or chew the capsules.
REMEMBER: This medicine has been prescribed only for you. Do not give it to anybody else. If you have any further questions, please ask your doctor or pharmacist.
Overdose
In case of overdose, contact your doctor or the nearest hospital emergency department, even though you may not feel sick.
Missed Dose
If you happen to miss a dose, do not try to make up for it by doubling up on the dose next time. Just take your next regularly scheduled dose and try not to miss any more.
Side effects and what to do about them
Like all medications, GD-venlafaxine XR can cause some side effects. You may not experience any of them. For most patients these side effects are likely to be minor and temporary. However, some may be serious. Some of these side effects may be dose related. Consult your doctor if you experience these or other side effects, as the dose may have to be adjusted.
If you experience an allergic reaction (including red skin, hives, itching, swelling of the lips, face, tongue, throat, trouble breathing, wheezing, shortness of breath, skin rashes, blisters of the skin, sores or pain in the mouth or eyes) or any severe or unusual side effects, stop taking the drug and contact your doctor immediately.
Some side effects of GD-venlafaxine XR are:
- headache
- nausea
- dry mouth
- constipation
- loss of appetite
- vomiting
- sleepiness
- dizziness
- insomnia
- sexual problems
- weakness
- sweating
- nervousness
- abnormal vision
- abnormal dreams
Particularly in the first few weeks or when doses are adjusted, a
small number of patients taking drugs of this type may feel
worse instead of better; for example, they may experience
unusual feelings of agitation, hostility or anxiety, or have
impulsive or disturbing thoughts such as thoughts of self-harm
or harm to others. Should this happen to you, or to those in your
care if you are a caregiver or guardian, consult your doctor
immediately; do not discontinue your medication on your own.
GD-venlafaxine XR does not usually affect people’s normal
activities. However, some people feel sleepy while taking it, in
which case they should not drive or operate machinery.
Although psychiatric disorders may be associated with decreases
in sexual desire, performance and satisfaction, treatment with
this medication may also affect sexual functioning.
GD-venlafaxine XR may increase blood pressure in some
people. You should have your blood pressure measured prior to
starting GD-venlafaxine XR and during treatment. High blood
pressure should be controlled before starting GD-venlafaxine
XR. Blood pressure changes may sometimes be sudden and
without warning. Consult your doctor if you have symptoms that
may indicate a sudden rise in your blood pressure, such as
headache (particularly in the back of head/neck when waking
up); stronger, possibly more rapid, or irregular heart beat; chest
pain; dizziness; excessive tiredness; or blurred vision.
GD-venlafaxine XR may raise cholesterol levels in some
patients. Blood cholesterol tests may be required by your doctor
during treatment with GD-venlafaxine XR.
Discontinuation Symptoms
Contact your doctor before stopping or reducing your dosage of
GD-venlafaxine XR. Symptoms such as anorexia (loss of
appetite, loss of weight), anxiety, agitation (restlessness),
aggression, confusion, convulsions, coordination problems,
diarrhea, dizziness, dry mouth, fatigue, headache, hypomania
(rapid mood swings), insomnia, nausea, nervousness,
nightmares, paresthesia (sensation of tingling, burning or
crawling of the skin), electric shock sensations, sleep
disturbances, somnolence (drowsiness), sweating, tinnitus
(ringing in the ears), vertigo (sensation that the world is
spinning), vomiting and other symptoms have been reported
after stopping treatment, reducing the dosage of GD-venlafaxine
XR, or when a dose is missed. These symptoms usually
disappear without needing treatment. Tell your doctor
immediately if you have these or any other symptoms. Your
doctor may adjust the dosage of GD-venlafaxine XR to alleviate
the symptoms.
Effects on Newborns
Some newborns whose mothers took an SSRI (Selective
Serotonin Reuptake Inhibitor) or other newer anti-depressant,
such as GD-venlafaxine XR, during pregnancy have shown such
symptoms as breathing and feeding difficulties, jitteriness and
constant crying. If your baby experiences any of these
symptoms, contact your doctor as soon as you can. See
WARNINGS AND PRECAUTIONS section for more
information.
| Symptom / effect | Talk with your doctor or pharmacist right away Only if severe | Talk with your doctor or pharmacist right away In all cases | Seek urgent medical attention |
|---|---|---|---|
| Common | |||
| Increased blood pressure that persists [see also Severe Hypertension below] | ✔ | ||
| Fast heartbeat | ✔ | ||
| Uncommon | |||
| Allergic reactions [red skin, hives, itching, swelling of the lips, face, tongue, throat, trouble breathing, wheezing, shortness of breath, skin rashes, blisters of the skin, sores or pain in the mouth or eyes] | ✔ | ||
| Low sodium level in blood [symptoms of tiredness, weakness, confusion combined with achy, stiff or uncoordinated muscles] | ✔ | ||
| Bruising or unusual bleeding from the skin or other areas | ✔ | ||
| Mania/hypomania [elevated or irritable mood, decreased need for sleep, racing thoughts] | ✔ | ||
| Akathisia [feeling restless and unable to sit or stand still] | ✔ | ||
| Hallucinations [strange visions or sounds] | ✔ | ||
| Uncontrollable movements of the body or face | ✔ | ||
| Inability to urinate | ✔ | ||
| Gastrointestinal bleeding [vomiting blood or passing blood in stools] | ✔ | ||
| Rare | |||
| Seizures [loss of consciousness with uncontrollable shaking “fit”] | ✔ | ||
| Serotonin syndrome [a combination of most or all of the following; confusion, restlessness, sweating, shaking, shivering, high fever, sudden jerking of the muscles, hallucinations, fast heartbeat] | ✔ | ||
| Liver disorder [symptoms include nausea, vomiting, loss of appetite combined with itching, yellowing of the skin or eyes, dark urine] | ✔ | ||
| Glaucoma: swelling or redness in or around the eye, eye pain and changes in vision | ✔ | ||
| Unknown | |||
| Low Platelets: Bruising or unusual bleeding from the skin or other areas | ✔ | ||
| See Warnings and Precautions | |||
| New or worsened emotional or behavioural problems | ✔ | ||
| See Side Effects and What to Do About Them | |||
| Severe Hypertension [symptoms include headache, stronger and possibly faster heartbeat, chest pain, dizziness, excessive tiredness, blurred vision] | ✔ | ||
This is not a complete list of side effects. For any unexpected effects while taking GD-venlafaxine XR, contact your doctor or pharmacist.
How to store
- Store GD-venlafaxine XR at room temperature (15-30°C), in a dry place.
- Keep container tightly closed.
- Keep all medicines out of the sight and reach of children.
- If your doctor tells you to stop taking GD-venlafaxine XR please return any left over medicine to your pharmacist.
Reporting side effects
You can report any suspected adverse reactions associated with the use of health products to the Canada Vigilance Program by one of the following 3 ways:
- Report online at www.canada.ca/en/health-canada/services/drugs-health-products/medeffect-canada/adverse-reaction-reporting.html
- Call toll-free at 1-866-234-2345
- Complete a Canada Vigilance Reporting Form and:
- Fax toll-free to 1-866-678-6789, or
- Mail to: Canada Vigilance Program
Health Canada
Postal Locator 1908C
Ottawa, Ontario
K1A 0K9
Postage paid labels, Canada Vigilance Reporting Form and the adverse reaction reporting guidelines are available on the MedEffect™ Canada Web site www.canada.ca/en/health-canada/services/drugs-health-products/medeffect-canada/adverse-reaction-reporting.html.
NOTE: Should you require information related to the management of side effects, contact your health professional. The Canada Vigilance Program does not provide medical advice.
More information
This document plus the full product monograph, prepared for
health professionals can be found by contacting the sponsor,
GenMed, a division of Pfizer Canada Inc.
17,300 Trans-Canada Highway
Kirkland, Quebec
H9J 2M5
Or toll-free, at: 1-800-463-6001
or at www.pfizer.ca
This leaflet was prepared by GenMed, a division of Pfizer
Canada Inc.
Last revised: April 19, 2018
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