Consumer Information for: RIVA-MEMANTINE

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

RIVA-MEMANTINE has been prescribed to you, by a doctor to relieve symptoms of Alzheimer’s disease.

What it does

The brain contains N-methyl-D-aspartate (NMDA) receptors that are involved in transmitting nerve signals and may be important for learning and memory. Abnormal transmission of nerve signals through NMDA-receptors in the brain may affect memory and other mental functions and contribute to symptoms of Alzheimer’s disease. Memantine hydrochloride belongs to a group of medicines called NMDA-receptor antagonists. The action of memantine hydrochloride on NMDA-receptors may help normalize the transmission of nerve signals, which may help slow the decline in some of the symptoms of Alzheimer disease.

When it should not be used
  • You should not be taking RIVA-MEMANTINE if you are pregnant, unless in the opinion of the doctor, the expected benefit to the patient markedly outweighs the possible hazards to the foetus.
  • You should not be taking RIVA-MEMANTINE if you are breast-feeding.
  • Do not take RIVA-MEMANTINE if you are allergic to it, or to any of the other ingredients listed in this leaflet (see « What the nonmedicinal ingredients are »).
  • Stop taking RIVA-MEMANTINE and contact your doctor immediately if you experience an allergic reaction or any severe side effect.
What the medicinal ingredient is

Memantine hydrochloride

What the non-medicinal ingredients are

Colloidal Silicon Dioxide, Crospovidone, Hydroxypropyl Methylcellulose, Lactose Monohydrate, Magnesium Stearate, Microcrystalline Cellulose, Polyethylene Glycol, Polysorbate 80, Titanium Dioxide.

What dosage form it comes in

Tablets: 10 mg

Warnings and precautions

BEFORE you use RIVA-MEMANTINE talk to your doctor or pharmacist if:

  • You have/had a medical condition, including heart problems, uncontrolled hypertension (high blood pressure), history of seizures or kidney disease
  • You are taking any medications (prescription or non-prescription) or have taken any within the last 14 days
  • You ever had an allergic reaction to any medication
  • You are pregnant or thinking of becoming pregnant, or if you are breast-feeding
  • There are conditions which can change the speed at which the body would normally eliminate the drug over time and you should tell your doctor, as RIVA-MEMANTINE dosage may have to be adjusted if:
    • You have recently changed or intend to change your diet substantially (e.g. from normal diet to strict vegetarian diet) 􀂃 You are suffering from renal tubulary acidosis (RTA, an excess of acid-forming substances in the blood due to renal dysfunction [kidney problems]) 􀂃 You have a urinary tract infection
Interactions with this medication

Drugs that may interact with RIVA-MEMANTINE include:

  • NMDA-receptor antagonists (e.g. amantadine)
  • Cimetidine
  • Ranitidine
  • Procainamide
  • Quinidine
  • Quinine
  • Hydrochlorothiazide (or any combination with hydrochlorothiazide)
  • Anticholinergics (generally used to treat movement disorders or intestinal cramps)
  • L-dopa and dopaminergic agonists (drugs such as bromocriptine, ropinirole, pramipexole)
  • Ketamine
  • Dextromethorphan (found in cough syrup labelled DM)
  • Anticoagulant (blood thinner) medications taken by mouth
Proper use of this medication

Usual Dose

  • It is important that you take RIVA-MEMANTINE exactly as your doctor has instructed.
  • Usually your doctor will prescribe 20 mg per day, which you will take as two separate doses of 10 mg. In order to reduce the risk of side effects this dose will be achieved gradually by the following daily treatment scheme, starting at a dose of 5 mg per day:
AM PM
Week 1 1 x 5 mg tablet None
Week 2 1 x 5 mg tablet 1 x 5 mg tablet
Week 3 1 x 10 mg tablet 1 x 5 mg tablet
Week 4 and beyond 1 x 10 mg tablet 1 x 10 mg tablet
  • Never change the dose of RIVA-MEMANTINE unless your doctor tells you to.
  • Swallow the tablets whole with some water. Do not chew tablets. RIVA-MEMANTINE can be taken with or without food.
  • Continue to take RIVA-MEMANTINE as long as directed by your doctor and you do not experience any unacceptable side effects. Your doctor should assess your treatment on a regular basis.

Overdose

If you have accidentally taken too much RIVA-MEMANTINE contact your regional Poison Control Centre, hospital emergency department or your doctor immediately, even if you do not feel sick. You may require medical attention. If you go to the doctor or the hospital, take the RIVA-MEMANTINE container with you.

Missed Dose

  • If you miss a dose, do not worry. Do not take the missed tablet(s) – just take the next dose when it is due.
Side effects and what to do about them

Like all medicines, RIVA-MEMANTINE can cause side effects, although not everybody gets them. In general, these are mild to moderate. If any of the side effects become severe or if they are troublesome or persistent, talk to your doctor.

Common side effects (affects 1 to 10 users in 100) may include:

  • headache
  • sleepiness
  • constipation
  • tiredness
  • confusion
  • hallucinations (strange visions or sounds)
  • vomiting
  • loss of appetite
  • dizziness
  • sleep disturbance
  • anxiety
  • high blood pressure
  • change in frequency of urination

Uncommon side effects (affects 1 to 10 users in 1000) may include:

  • fungal infections
  • changes in vision
  • skin allergies

Your doctor will tell you whether your illness allows you to drive or operate machinery. Also, as this product may cause sleepiness or dizziness, do not drive or operate machinery under these conditions.

Alzheimer's disease has been associated with depression, thoughts of suicide and suicide. These events have been reported in patients treated with memantine hydrochloride.

If you have previously experienced epileptic seizures, there is a possibility that RIVA-MEMANTINE may increase the chances of one occurring.

Serious side effects, how often they happen and what to do about them
Symptom / effect Talk with your doctor, nurse, or pharmacist only if severe Talk with your doctor, nurse, or pharmacist in all cases Stop taking drug and seek immediate emergency treatment
Uncommon
Fungal infection ✔    
Abnormal gait [Abnormal way of walking]   ✔  
Heart failure [persistent chest pain, rapid heart rate, severe shortness of breath, swelling of legs or ankles, increased tiredness, lack of appetite, confusion]     ✔
Venous blood clotting [pain, swelling, changes in skin color, increased warmth in one leg]     ✔
Very rare
Seizures [loss of consciousness with uncontrollable shaking]     ✔
Hepatitis/hepatic failure [yellow skin and eyes, nausea, loss of appetite, dark-coloured urine]     ✔
Inflammation of the pancreas [severe upper stomach pain, often with nausea and vomiting]     ✔
Psychotic reactions     ✔
Serious skin reactions [rash, red skin, blistering of the lips, eyes or mouth, skin peeling]

For example:

Stevens-Johnson Syndrome: Severe rash with blisters and peeling skin, particularly around the mouth, nose, eyes and genitals

Acute Generalized Exanthematous Pustulosis: Red rash covered with small pusfilled bumps that can spread over the body, sometimes with a fever

Erythema Multiforme: Rash that may blister, with spots that look like small targets		     ✔

This is not a complete list of side effects. For any unexpected effects while taking RIVA-MEMANTINE contact your doctor or pharmacist.

If you notice any side effects not listed in this leaflet, please tell your doctor or pharmacist.

How to store
  • As with all medicines, keep RIVA-MEMANTINE out of the reach of children.
  • Store your tablets at room temperature (15°C-30°C). Protect from moisture.
  • If your doctor tells you to stop taking your medicine you should return any leftover tablets to the pharmacist, unless the doctor tells you to keep them at home.

REMEMBER: This medicine is for YOU or for someone in your care. Only a doctor can prescribe it, so never offer it to any other person, even if their symptoms seem to be the same as yours or as for the person in your care.

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 three ways:

  • Report online at www.healthcanada.gc.ca/medeffect
  • 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 0701E
      Ottawa ON K1A 0K9

Postage paid labels, Canada Vigilance Reporting Form and the adverse reaction reporting guidelines are available on the MedEffectTM Canada Web site at www.healthcanada.gc.ca/medeffect.

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 obtained by contacting Laboratoire Riva Inc., at: 1-800-363-7988.

This leaflet was prepared by

Laboratoire Riva Inc.
660 Industriel Blvd.
Blainville, Quebec, Canada.
J7C 3V4

www.labriva.com

Last revised: Aug. 04, 2016

Report a problem or mistake on this page
Please select all that apply:
Date modified: