Drugs Similar to LAMOTRIGINE ER

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine’s chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as-triazine, its molecular formula is C 9H 7N 5Cl 2, and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: [Chemical Structure] Lamotrigine Extended-Release Tablets, USP are supplied for oral administration as 25-mg (yellow), 50-mg (green), 100-mg (orange), 200-mg (blue), 250-mg (purple), and 300-mg (gray) tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid and ethyl arcylate copolymer dispersion, mono- and di-glycerides, polysorbate 80, silicon dioxide(25- and 50- mg tablets only), sodium hydroxide, sodium lauryl sulfate, titanium dioxide, triethyl citrate, iron oxide black(50- and 300- mg tablets only), iron oxide red(100- and 250- mg tablets only), iron oxide yellow(25-, 50-, 100- mg tablets only), FD&C Blue No. 2 Aluminum Lake(200- and 250- mg tablets only). Tablets are printed with edible black ink (black ink is composed of ferrosoferric oxide, propylene glycol and shellac). Lamotrigine Extended-Release Tablets, USP contain a modified-release formulation as the core. The tablets are coated with a clear enteric coat to enable a controlled release of drug in the acidic environment of the stomach. The combination of this and the modified-release core are designed to control the dissolution rate of lamotrigine over a period of approximately 12 to 15 hours, leading to a gradual increase in serum lamotrigine levels. FDA approved dissolution test specifications differ from USP.

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine’s chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as-triazine, its molecular formula is C 9H 7N 5Cl 2, and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: [Chemical Structure] Lamotrigine Extended-Release Tablets, USP are supplied for oral administration as 25-mg (yellow), 50-mg (green), 100-mg (orange), 200-mg (blue), 250-mg (purple), and 300-mg (gray) tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid and ethyl arcylate copolymer dispersion, mono- and di-glycerides, polysorbate 80, silicon dioxide(25- and 50- mg tablets only), sodium hydroxide, sodium lauryl sulfate, titanium dioxide, triethyl citrate, iron oxide black(50- and 300- mg tablets only), iron oxide red(100- and 250- mg tablets only), iron oxide yellow(25-, 50-, 100- mg tablets only), FD&C Blue No. 2 Aluminum Lake(200- and 250- mg tablets only). Tablets are printed with edible black ink (black ink is composed of ferrosoferric oxide, propylene glycol and shellac). Lamotrigine Extended-Release Tablets, USP contain a modified-release formulation as the core. The tablets are coated with a clear enteric coat to enable a controlled release of drug in the acidic environment of the stomach. The combination of this and the modified-release core are designed to control the dissolution rate of lamotrigine over a period of approximately 12 to 15 hours, leading to a gradual increase in serum lamotrigine levels. FDA approved dissolution test specifications differ from USP.

LAMICTAL (lamotrigine), an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine’s chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: LAMICTAL tablets are supplied for oral administration as 25-mg (white), 100-mg (peach), 150-mg (cream), and 200-mg (blue) tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: lactose; magnesium stearate; microcrystalline cellulose; povidone; sodium starch glycolate; FD&C Yellow No. 6 Lake (100-mg tablet only); ferric oxide, yellow (150-mg tablet only); and FD&C Blue No. 2 Lake (200-mg tablet only). LAMICTAL tablets for oral suspension are supplied for oral administration. The tablets contain 2 mg (white), 5 mg (white), or 25 mg (white) of lamotrigine and the following inactive ingredients: blackcurrant flavor, calcium carbonate, low-substituted hydroxypropylcellulose, magnesium aluminum silicate, magnesium stearate, povidone, saccharin sodium, and sodium starch glycolate. The tablets for oral suspension meet Organic Impurities Procedure 2 as published in the current USP monograph for Lamotrigine Tablets for Oral Suspension. LAMICTAL ODT orally disintegrating tablets are supplied for oral administration. The tablets contain 25 mg (white to off-white), 50 mg (white to off-white), 100 mg (white to off-white), or 200 mg (white to off-white) of lamotrigine and the following inactive ingredients: artificial cherry flavor, crospovidone, ethylcellulose, magnesium stearate, mannitol, polyethylene, and sucralose. LAMICTAL ODT orally disintegrating tablets are formulated using technologies (Microcaps and AdvaTab) designed to mask the bitter taste of lamotrigine and achieve a rapid dissolution profile. Tablet characteristics including flavor, mouth-feel, after-taste, and ease of use were rated as favorable in a study in 108 healthy volunteers. lamotrigine chemical structure

LAMICTAL XR (lamotrigine), an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine’s chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: LAMICTAL XR extended-release tablets are supplied for oral administration as 25-mg (yellow with white center), 50-mg (green with white center), 100-mg (orange with white center), 200-mg (blue with white center), 250-mg (purple with white center), and 300-mg (gray with white center) tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: glycerol monostearate, hypromellose, lactose monohydrate; magnesium stearate; methacrylic acid copolymer dispersion, polyethylene glycol 400, polysorbate 80, silicon dioxide (25- and 50-mg tablets only), titanium dioxide, triethyl citrate, carmine (250-mg tablet only), iron oxide black (50-, 250-, and 300-mg tablets only), iron oxide yellow (25-, 50-, and 100-mg tablets only), iron oxide red (100-mg tablet only), FD&C Blue No. 2 Aluminum Lake (200- and 250-mg tablets only). Tablets are printed with edible black ink. LAMICTAL XR extended-release tablets contain a modified-release eroding formulation as the core. The tablets are coated with a clear enteric coat and have an aperture drilled through the coats on both faces of the tablet (DiffCORE) to enable a controlled release of drug in the acidic environment of the stomach. The combination of this and the modified-release core are designed to control the dissolution rate of lamotrigine over a period of approximately 12 to 15 hours, leading to a gradual increase in serum lamotrigine levels. Lamictal XR Chemical Structure

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine’s chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Lamotrigine Extended-Release Tablets, USP are supplied for oral administration as 25-mg (yellow), 50-mg (green), 100-mg (orange), 200-mg (blue), 250-mg (purple), and 300-mg (gray) tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid and ethyl arcylate copolymer dispersion, mono- and di-glycerides, polysorbate 80, silicon dioxide(25- and 50- mg tablets only), sodium hydroxide, sodium lauryl sulfate, titanium dioxide, triethyl citrate, iron oxide black(50- and 300- mg tablets only), iron oxide red(100- and 250- mg tablets only), iron oxide yellow(25-, 50-, 100- mg tablets only), FD&C Blue No. 2 Aluminum Lake(200- and 250- mg tablets only). Tablets are printed with edible black ink (black ink is composed of ferrosoferric oxide, propylene glycol and shellac). Lamotrigine Extended-Release Tablets, USP contain a modified-release formulation as the core. The tablets are coated with a clear enteric coat to enable a controlled release of drug in the acidic environment of the stomach. The combination of this and the modified-release core are designed to control the dissolution rate of lamotrigine over a period of approximately 12 to 15 hours, leading to a gradual increase in serum lamotrigine levels. FDA approved dissolution test specifications differ from USP. Chemical Structure

Lamotrigine USP, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine's chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)-as-triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.1. Lamotrigine USP is a white to pale cream-colored powder and has a pKa of 5.7. Lamotrigine USP is slightly soluble in anhydrous ethanol, practically insoluble in dilute hydrochloric acid and in water. The structural formula is: Lamotrigine Orally Disintegrating Tablets, USP are supplied for oral administration. The tablets contain 25 mg (white to off-white), 50 mg (white to off-white), 100 mg (white to off white), or 200 mg (white to off-white) of lamotrigine and the following inactive ingredients: amino methacrylate copolymer, aspartame, colloidal silicon dioxide, crospovidone, kollidon SR, magnesium stearate, mannitol, sucralose and artificial cherry flavor containing dextrose, corn starch, and tricalcium phosphate. structure

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine’s chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Lamotrigine Extended-Release Tablets, USP are supplied for oral administration as 25-mg (yellow), 50-mg (green), 100-mg (orange), 200-mg (blue), 250-mg (purple), and 300-mg (gray) tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid and ethyl arcylate copolymer dispersion, mono- and di-glycerides, polysorbate 80, silicon dioxide(25- and 50- mg tablets only), sodium hydroxide, sodium lauryl sulfate, titanium dioxide, triethyl citrate, iron oxide black(50- and 300- mg tablets only), iron oxide red(100- and 250- mg tablets only), iron oxide yellow(25-, 50-, 100- mg tablets only), FD&C Blue No. 2 Aluminum Lake(200- and 250- mg tablets only). Tablets are printed with edible black ink (black ink is composed of ferrosoferric oxide, propylene glycol and shellac). Lamotrigine Extended-Release Tablets, USP contain a modified-release formulation as the core. The tablets are coated with a clear enteric coat to enable a controlled release of drug in the acidic environment of the stomach. The combination of this and the modified-release core are designed to control the dissolution rate of lamotrigine over a period of approximately 12 to 15 hours, leading to a gradual increase in serum lamotrigine levels. FDA approved dissolution test specifications differ from USP. Chemical Structure

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine's chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine, USP is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Each lamotrigine tablet, USP intended for oral administration contains 25 mg or 100 mg or 150 mg or 200 mg of lamotrigine. In addition, each tablet contains the following inactive ingredients: lactose monohydrate, magnesium stearate, microcrystalline cellulose, povidone and sodium starch glycolate. Lamotrigine tablets, USP comply with USP Dissolution Test 3. Structured formula for Lamotrigine

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine's chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine, USP is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Each lamotrigine tablet, USP intended for oral administration contains 25 mg or 50 mg or 100 mg or 150 mg or 200 mg or 250 mg of lamotrigine. In addition, each tablet contains the following inactive ingredients: lactose monohydrate, magnesium stearate, microcrystalline cellulose, povidone and sodium starch glycolate. Each lamotrigine tablets for oral suspension, USP intended for oral administration contains 5 mg or 25 mg of amotrigine. In addition, each tablet contains the following inactive ingredients: aspartame, croscarmellose sodium, flavour black currant, magnesium stearate, mannitol, microcrystalline cellulose, silicon dioxide and tribasic calcium phosphate. Lamotrigine tablets, USP comply with USP Dissolution Test 3. Lamotrigine Tablets for Oral Suspension, USP comply with Organic Impurities Procedure 2. Structured formula for Lamotrigine

Lamotrigine, USP, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine’s chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09 g/mol. Lamotrigine, USP is a white powder and has a pKa of 5.7. Lamotrigine, USP is slightly soluble in 0.1 N hydrochloric acid, in acetone, in methanol, and in water. The structural formula is: Lamotrigine tablets for oral suspension (chewable, dispersible tablets), 5 mg and 25 mg are supplied for oral administration. The tablets contain 5 mg (white to off-white) or 25 mg (white to off-white) of lamotrigine, USP and the following inactive ingredients: aspartame, colloidal silicon dioxide, magnesium stearate, microcrystalline cellulose, povidone K-25, sodium starch glycolate and strawberry guarana 586997 AP 0551. FDA approved dissolution test specifications differ the USP for Lamotrigine tablets for oral suspension, USP (chewable, dispersible tablets), 5 mg and 25 mg. sturcture

Lamotrigine USP, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine’s chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine is off-white to white crystalline powder. Lamotrigine is very slightly soluble in water, and slightly soluble in 0.1 M HCl. The structural formula is: Lamotrigine tablets are supplied for oral administration as 25 mg (white), 100 mg (white), 150 mg (white), and 200 mg (white) tablets. In addition, each tablet contains the following inactive ingredients: lactose monohydrate; magnesium stearate; microcrystalline cellulose; sodium starch glycolate. Chemical Structure

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine’s chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)-as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pKa of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Lamotrigine Tablets USP are supplied for oral administration as 25-mg, 100-mg, 150-mg and 200-mg white to off white tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: lactose monohydrate; sodium starch glycolate; povidone; magnesium stearate and talc. It meets USP Dissolution Test 3. Structure

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. It's chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pKa of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Lamotrigine tablets USP are supplied for oral administration as 25 mg, 100 mg, 150 mg or 200 mg tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: lactose monohydrate, magnesium stearate, microcrystalline cellulose, povidone and sodium starch glycolate. In addition, the 200 mg tablets contain FD&C Blue No. 2 Lake. Molecular Structure

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. It's chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pKa of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Lamotrigine tablets USP are supplied for oral administration as 25 mg, 100 mg, 150 mg or 200 mg tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: lactose monohydrate, magnesium stearate, microcrystalline cellulose, povidone and sodium starch glycolate. In addition, the 200 mg tablets contain FD&C Blue No. 2 Lake. Molecular Structure

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine's chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Lamotrigine Tablets USP are supplied for oral administration as 25 mg (white), 100 mg (light peach), 150 mg (cream), and 200 mg (light blue) tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: croscarmellose sodium, crospovidone, FD&C Blue #2 Aluminum Lake (200 mg strength only), FD&C Yellow No. 6 Lake (100 mg strength only), lactose monohydrate, magnesium stearate, microcrystalline cellulose, povidone, and yellow iron oxide (150 mg strength only). Meets USP Dissolution Test 3. Chemical Structure

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs Lamotrigine’s. Its chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Lamotrigine tablets, USP are supplied for oral administration as 25 mg, 100 mg, 150 mg and 200 mg tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: colloidal silicon dioxide, magnesium stearate, microcrystalline cellulose and sodium starch glycolate. Meets USP Dissolution Test 2 "Image Description"

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine's chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine, USP is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Each lamotrigine tablet, USP intended for oral administration contains 25 mg or 50 mg or 100 mg or 150 mg or 200 mg or 250 mg of lamotrigine. In addition, each tablet contains the following inactive ingredients: lactose monohydrate, magnesium stearate, microcrystalline cellulose, povidone and sodium starch glycolate. Each lamotrigine tablets for oral suspension, USP intended for oral administration contains 5 mg or 25 mg of lamotrigine. In addition, each tablet contains the following inactive ingredients: aspartame, croscarmellose sodium, flavour black currant, magnesium stearate, mannitol, microcrystalline cellulose, silicon dioxide and tribasic calcium phosphate. Lamotrigine tablets, USP comply with USP Dissolution Test 3. Lamotrigine Tablets for Oral Suspension, USP comply with Organic Impurities Procedure 2. Structured formula for Lamotrigine

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. It's chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pKa of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Lamotrigine tablets USP are supplied for oral administration as 25 mg, 100 mg, 150 mg or 200 mg tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: lactose monohydrate, magnesium stearate, microcrystalline cellulose, povidone and sodium starch glycolate. In addition, the 200 mg tablets contain FD&C Blue No. 2 Lake. Molecular Structure

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. It's chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pKa of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Lamotrigine tablets USP are supplied for oral administration as 25 mg, 100 mg, 150 mg or 200 mg tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: lactose monohydrate, magnesium stearate, microcrystalline cellulose, povidone and sodium starch glycolate. In addition, the 200 mg tablets contain FD&C Blue No. 2 Lake. Molecular Structure

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine’s chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Lamotrigine Extended-Release Tablets, USP are supplied for oral administration as 25-mg (yellow), 50-mg (green), 100-mg (orange), 200-mg (blue), 250-mg (purple), and 300-mg (gray) tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: hypromellose, lactose monohydrate, magnesium stearate, methacrylic acid and ethyl arcylate copolymer dispersion, mono- and di-glycerides, polysorbate 80, silicon dioxide(25- and 50- mg tablets only), sodium hydroxide, sodium lauryl sulfate, titanium dioxide, triethyl citrate, iron oxide black(50- and 300- mg tablets only), iron oxide red(100- and 250- mg tablets only), iron oxide yellow(25-, 50-, 100- mg tablets only), FD&C Blue No. 2 Aluminum Lake(200- and 250- mg tablets only). Tablets are printed with edible black ink (black ink is composed of ferrosoferric oxide, propylene glycol and shellac). Lamotrigine Extended-Release Tablets, USP contain a modified-release formulation as the core. The tablets are coated with a clear enteric coat to enable a controlled release of drug in the acidic environment of the stomach. The combination of this and the modified-release core are designed to control the dissolution rate of lamotrigine over a period of approximately 12 to 15 hours, leading to a gradual increase in serum lamotrigine levels. FDA approved dissolution test specifications differ from USP. Chemical Structure

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. It's chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)-as-triazine, its molecular formula is C9H7N5Cl2, and its molecular weight is 256.09. Lamotrigine is a white to pale cream-colored powder and has a pKa of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Lamotrigine tablets USP are supplied for oral administration as 25 mg, 100 mg, 150 mg or 200 mg tablets. Each tablet contains the labeled amount of lamotrigine and the following inactive ingredients: lactose monohydrate, magnesium stearate, microcrystalline cellulose, povidone and sodium starch glycolate. In addition, the 200 mg tablets contain FD&C Blue No. 2 Lake. Description

Lamotrigine, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine's chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2 , and its molecular weight is 256.09. Lamotrigine, USP is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C). The structural formula is: Each lamotrigine tablet, USP intended for oral administration contains 25 mg or 50 mg or 100 mg or 150 mg or 200 mg or 250 mg of lamotrigine. In addition, each tablet contains the following inactive ingredients: lactose monohydrate, magnesium stearate, microcrystalline cellulose, povidone and sodium starch glycolate. Each lamotrigine tablets for oral suspension, USP intended for oral administration contains 5 mg or 25 mg of amotrigine. In addition, each tablet contains the following inactive ingredients: aspartame, croscarmellose sodium, flavour black currant, magnesium stearate, mannitol, microcrystalline cellulose, silicon dioxide and tribasic calcium phosphate. Lamotrigine tablets, USP comply with USP Dissolution Test 3. Lamotrigine Tablets for Oral Suspension, USP comply with Organic Impurities Procedure 2. Structured formula for Lamotrigine