RATIO-LAMOTRIGINE TABLET

Country: Canada

Language: English

Source: Health Canada

Active ingredient:

LAMOTRIGINE

Available from:

TEVA CANADA LIMITED

ATC code:

N03AX09

INN (International Name):

LAMOTRIGINE

Dosage:

25MG

Pharmaceutical form:

TABLET

Composition:

LAMOTRIGINE 25MG

Administration route:

ORAL

Units in package:

100

Prescription type:

Prescription

Therapeutic area:

MISCELLANEOUS ANTICONVULSANTS

Product summary:

Active ingredient group (AIG) number: 0127134003; AHFS:

Authorization status:

CANCELLED POST MARKET

Authorization date:

2016-12-05

Summary of Product characteristics

PRODUCT MONOGRAPH
RATIO-LAMOTRIGINE
(lamotrigine)
25, 100 and 150 mg Tablets
Antiepileptic
Teva Canada Limited
Date of Revision:
30 Novopharm Court
November 6, 2014
Toronto, Ontario
Canada
M1B 2K9
Control No.: 178540
2
PRODUCT MONOGRAPH
DO NOT EXCEED THE RECOMMENDED INITIAL DOSE AND SUBSEQUENT DOSE
ESCALATIONS OF RATIO-
LAMOTRIGINE. MORE RAPID INITIAL TITRATION HAS BEEN ASSOCIATED WITH AN
INCREASED INCIDENCE
OF SERIOUS DERMATOLOGICAL REACTIONS (SEE WARNINGS).
RATIO-LAMOTRIGINE
lamotrigine
(25, 100 and 150 mg Tablets)
ANTIEPILEPTIC
ACTION AND CLINICAL PHARMACOLOGY
Lamotrigine is a drug of the phenyltriazine class chemically unrelated
to existing antiepileptic drugs
(AEDs).
Lamotrigine is thought to act at voltage-sensitive sodium channels to
stabilize neuronal membranes
and inhibit the release of excitatory amino acid neurotransmitters
(e.g. glutamate, aspartate) that are
thought to play a role in the generation and spread of epileptic
seizures.
CLINICAL TRIALS
In adult placebo-controlled clinical studies, lamotrigine has been
shown to be effective in reducing
seizure frequency and the number of days with seizures when added to
existing antiepileptic drug
therapy in adult patients with partial seizures,
with or without generalized tonic-clonic seizures, that
are not satisfactorily controlled.
The effectiveness of lamotrigine adjunctive therapy has also been
shown in pediatric and adult
patients with Lennox-Gastaut syndrome. A significant reduction in
major motor seizures, drop
attacks, and tonic-clonic seizures were seen following lamotrigine
treatment compared with placebo
treated patients. Improvements in cognitive skills (speech, nonverbal
communication, alertness,
attention, intellectual capacity), behaviour, and fine coordination
have been seen with lamotrigine
treatment in these patients.
Studies have also been conducted using lamotrigine monotherapy in
adult patients (n = 443) newly
diagnosed with epilepsy (partial seizures, with or without secondary
generalization or primary
generalized tonic clonic). Resu