SUMMARY OF PRODUCT CHARACTERISTICS

1 NAME OF THE MEDICINAL PRODUCT

Nicabate Extra Fresh Mint 2 mg medicated chewing gum

2    QUALITATIVE AND QUANTITATIVE    COMPOSITION

Each chewing gum contains 2 mg nicotine (equivalent to 14.20 mg nicotine resinate)

Excipients with known effect:

Butylated Hydroxytoluene (E321) 0.4266 mg/piece gum Sorbitol (E420) 148.65 mg/piece gum Sodium 10.5 mg/piece gum

For the full list of excipients, see section 6.1.

3    PHARMACEUTICAL FORM

Medicated Chewing Gum

Off-white rectangular pillow shaped gum and is approximately 20 x 12 mm.

4    CLINICAL PARTICULARS

4.1    Therapeutic indications

Nicabate Extra Fresh Mint Gum is used for the treatment of tobacco dependence by relief of nicotine withdrawal symptoms including cravings during a quit attempt (see section 5.1). Permanent cessation of tobacco use is the eventual objective.

Nicabate Extra Fresh Mint Gum should preferably be used in conjunction with a behavioural support programme.

4.2    Posology and method of administration

Posology

Users should make every effort to stop smoking completely during treatment with Nicabate Extra Fresh Mint Gums.

Adults (18 years and over)

Nicabate Extra Fresh Mint Gum 2mg is suitable for smokers who smoke fewer than 20 cigarettes a day.

Behavioural therapy, advice and support will normally improve the success rate.

The initial dosage should be individualised on the basis of the patients nicotine dependence.

One piece of Nicabate Extra Fresh Mint Gums should be chewed as directed whenever there is an urge to smoke, to maintain complete abstinence from smoking.

Sufficient gums should be used each day usually 8-12, up to a maximum of 15.

The treatment duration depends on the needs of each smoker. In general the use of the medicated chewing gum is 2- 3 months, then the use of gums may be reduced gradually. When daily use is 1-2 gums, use should be stopped. Any spare gums should be retained, as cravings may suddenly return.

Paediatric population

Nicabate Extra Fresh Mint Gums should only be used by adolescents (12 - 17 years inclusive) with advice from a physician. There is only limited experience from the use of Nicabate Extra Fresh Mint Gums in this age group.

Nicabate Extra Fresh Mint Gums are contraindicated in children under 12 years old.

Method of administration

The chewing gums should be used whenever there is an urge to smoke according to the “chew and rest” technique: chew slowly until the taste becomes strong (about 1 minute) then stop and rest the gum against the cheek. When the taste fades, chew a few times until the taste gets strong then rest the gum again. After 30 minutes of such use, the gum will be exhausted. Not more than 15 pieces of the chewing gum may be used each day.

The user should not eat or drink while using the chewing-gum. Drinks that lower the pH in the mouth, e.g. coffee, fruit juice or sodas, may reduce the absorption of nicotine from the oral cavity. To achieve the maximum absorption of nicotine, these drinks should be avoided up to 15 minutes prior to using the chewing gum.

4.3 Contraindications

•    Hypersensitivity to the active substance or to any of the excipients listed in section 6.1

•    Children under the age of 12 years

4.4 Special warnings and precautions for use

The risks associated with the use of NRT are substantially outweighed in virtually all circumstances by the well established dangers of continued smoking.

Dependent smokers with a recent myocardial infarction, unstable or worsening angina including Prinzmetal’s angina, severe cardiac arrhythmias, uncontrolled hypertension or recent cerebrovascular accident should be encouraged to stop smoking with non-pharmacological interventions (such as counseling). If this fails, Nicabate Mint Gum may be considered, but as data on safety in this patient group are limited, initiation should only be under medical supervision. If there is a clinically significant increase in cardiovascular or other effects attributable to nicotine, the dose should be reduced or discontinued.

Diabetes: Blood glucose levels may be more variable when stopping smoking, with or without NRT, so it is important for diabetics to continue monitoring blood sugar levels while using this product.

Allergic reactions: Susceptibility to angio-oedema and urticaria.

A risk-benefit assessment should be made by an appropriate healthcare professional for patients with the following conditions:

•    Renal and hepatic impairment: Use with caution in patients with moderate to severe hepatic impairment and/or moderate to severe renal impairment as the clearance of nicotine or its metabolites may be decreased with the potential for increased adverse events.

•    Phaeochromocytoma and uncontrolled hyperthyroidism: Use with caution in patients with uncontrolled hyperthyroidism or phaeochromocytoma as nicotine causes release of catecholamines.

•    GI disease: Swallowing of-nicotine may exacerbate symptoms in persons suffering from active oesophagitis, oral or pharyngeal inflammation, gastritis, gastric ulcer or peptic ulcers and oral NRT preparations should be used with caution in these conditions. Ulcerative stomatitis has been reported.

Smokers who wear dentures or who have temporomandibular joint disease may experience difficulty in chewing Nicabate Extra Fresh Mint Gum.

Danger in small children: Doses of nicotine that are tolerated by adult and adolescent smokers can produce severe toxicity in small children that may be fatal. Products containing nicotine should not be left where they may be misused, handled or ingested by children.

Stopping smoking: Polycyclic aromatic hydrocarbons in tobacco smoke induce the metabolism of drugs metabolised by CYP 1A2 (and possibly by CYP 1A1). When a smoker stops smoking this may result in a slower metabolism and a consequent rise in blood levels of such drugs. This is of potential clinical importance for products with a narrow therapeutic window, e.g. theophylline, tacrine, clozapine and ropinirole. The plasma concentration of other medicinal products metabolised in part by CYP1A2 e.g. imipramine, olanzapine, clomipramine and fluvoxamine may also increase on cessation of smoking, although data to support this are lacking and the possible clinical significance of this effect for these drugs is unknown. Limited data indicate that the metabolism of flecainide and pentazocine may also be induced by smoking.

Transferred dependence: Transferred dependence is rare and is both less harmful and easier to break than smoking dependence.

Sorbitol (E420) Patients with rare hereditary problems of fructose intolerance should not take this medicine.

Butylated hydroxytoluene (E321): May cause irritation of mucous membranes.

Sodium: Nicabate Extra Fresh Mint Gum contains 10.5 mg of sodium per piece of gum. To be taken into consideration by patients on a controlled sodium diet.

During a quit attempt users should not interchange nicotine gums with nicotine lozenges since pharmacokinetic data indicate a higher availability of nicotine from some nicotine lozenges in comparison to the gum.

4.5 Interaction with other medicinal products and other forms of interaction

No clinically relevant interactions between nicotine replacement therapy and other drugs have definitely been established; However nicotine may possibly enhance the haemodynamic effects of adenosine. i.e. increase in blood pressure and heart rate and also increase pain response (anginapectoris type chest pain) provoked by adenosine administration, (see section 4.4).

Smoking cessation itself may require the adjustment of some drug therapy.

4.6 Fertility, pregnancy and lactation

Pregnancy

Smoking during pregnancy is associated with risks such as intra-uterine growth retardation, premature birth or stillbirth. Stopping smoking is the single most effective intervention for improving the health of both pregnant smoker and her baby. The earlier abstinence is achieved the better.

Ideally smoking cessation during pregnancy should be achieved without NRT. However for women unable to quit on their own, NRT may be recommended by a healthcare professional to assist a quit attempt. The risk of using NRT to the foetus is lower than that expected with tobacco smoking, due to lower maximal plasma nicotine concentration and no additional exposure to polycyclic hydrocarbons and carbon monoxide.

However, as nicotine passes to the foetus affecting breathing movements and has a dose dependent effect on placental/foetal circulation, the decision to use NRT should be made as early on in the pregnancy as possible. The aim should be to use NRT for only 2-3 months.

Intermittent dosing products may be preferable as these usually provide a lower daily dose of nicotine than patches. However patches may be preferred if the woman is suffering from nausea during pregnancy

Breastfeeding

Nicotine from smoking and NRT is found in breast milk. However the amount of nicotine the infant is exposed to from NRT is relatively small and less hazardous than the second-hand smoke they would otherwise be exposed to.

Ideally smoking cessation during lactation should be achieved without NRT.

However for women unable to quit on their own, NRT may be recommended by a healthcare professional to assist a quit attempt.

Using intermittent dose NRT preparations, compared with patches, may minimize the amount of nicotine in the breast milk as the time between administrations of NRT and feeding can be made as long as possible. Women should try to breastfeed just before they take the product.

Fertility

Studies in male rats have shown that nicotine can decrease testis weight, cause a reversible decrease in Sertoli cell numbers with impairment of spermatogenesis, and result in a variety of changes in the epididymis and vas deferens. However, similar effects have not been reported to occur in humans. See section 5.3.

4.7 Effects on ability to drive and use machines

Nicabate Extra Fresh Mint Gums have no or negligible influence on the ability to drive and use machines. However, users of nicotine replacement products should be aware that smoking cessation can cause behavioural changes.

4.8 Undesirable effects

NRT can cause adverse reactions similar to those associated with nicotine administered in other ways, including smoking. These may be attributed to the pharmacological effects of nicotine, some of which are dose dependent. Excessive consumption of Nicabate Extra Fresh Mint Gums by those who have not been in the habit of inhaling tobacco smoke could possibly lead to nausea, faintness or headaches.

Certain symptoms which have been reported such as depression, irritability, anxiety, increased appetite and insomnia may be related to withdrawal symptoms associated with smoking cessation. Subjects quitting smoking by

any means could expect to suffer from headache, dizziness, sleep disturbance, increased coughing or a cold.

Adverse reactions are listed below by system organ class and frequency. Frequencies are defined as: Very common (>1/10), common (>1/100 to 1/<10), uncommon (>1/1,000 to <1/100), rare (>1/10,000 to <1/1,000) and very rare (<1/10,000), not known (cannot be estimated from the available data).

System Organ Class and Frequency	Adverse Reaction /Events
Immune system disorders Rare	allergic reactions such as angio-oedema
Very rare	anaphylactic reactions
Psychiatric disorders Common	insomnia, irritability
Nervous System Disorders Common Uncommon	dizziness; headache
	lightheadedness, tremor
Cardiac disorders Uncommon	palpitation; tachycardia
Rare	atrial fibrillation
Respiratory, thoracic and mediastinal disorders Common	hiccups; sore throat; pharyngitis; cough; pharyngolaryngeal pain
Uncommon	dyspnoea
Gastrointestinal system disorders Common Uncommon	nausea; gastro-intestinal discomfort; sore mouth; vomiting; indigestion; mouth irritation; mouth ulceration; dyspepsia; abdominal pain upper; diarrhoea; dry mouth; constipation; hiccups; flatulence; oral discomfort
	stomatitis

System Organ Class and Frequency	Adverse Reaction /Events
Skin and subcutaneous tissue disorders
Uncommon	erythema; urticaria; increased sweating
Musculoskeletal and connective tissue disorders Common	jaw pain
General disorders and administration site conditions
Uncommon	chest pain; arthralgia; myalgia; malaise
Special senses other, disorders
Uncommon	parageusia; metallic taste; taste perversion

Reporting of suspected adverse reactions Reporting of suspected adverse reactions

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the Yellow Card Scheme at: www.mhra.gov.uk/yellowcard.

Increased frequency of aphthous ulcer may occur after abstinence from smoking. The medicated chewing-gum may stick to and in rare cases damage dentures and dental appliances.

Paediatric Population (12-17years inclusive)

There are no specific adverse event data for this population.

4.9 Overdose

Symptoms: The minimum lethal dose of nicotine in a non-tolerant man has been estimated to be 40 to 60 mg. Even small quantities of nicotine may be dangerous in children and may prove fatal. Suspected nicotine poisoning in a child should be considered a medical emergency and treated immediately.

Signs and symptoms of an overdose from nicotine gums would be expected to be the same as those of acute nicotine poisoning including pallor, cold sweat salivation, nausea, vomiting, abdominal pain, diarrhoea, headache, dizziness, disturbed hearing and vision, tremor, mental confusion weakness.

Prostration, hypotension, respiratory failure, rapid or weak or irregular pulse, circulatory collapse and convulsions (including terminal convulsions) may ensue with large overdoses.

Management: In the event of an overdose (e.g. too many gums ingested) the user should seek medical attention immediately. All nicotine intake should cease immediately and the patient be treated symptomatically. Artificial respiration with oxygen should be instituted if necessary. Activated charcoal reduces the gastrointestinal absorption of nicotine.

5 PHARMACOLOGICAL PROPERTIES

5.1 Pharmacodynamic properties

Pharmacotherapeutic group: Drugs used in nicotine dependence ATC Code: N07B A01

Mechanism of action

Nicotine is an agonist at nicotine receptors in the peripheral and central nervous system and has pronounced CNS and cardiovascular effects. When consumed in tobacco products, it has been shown to be addictive and abstinence is linked to craving and withdrawal symptoms. These craving and withdrawal symptoms include urge to smoke, depressed mood, insomnia, irritability, frustration or anger, anxiety, difficulty in concentrating, restlessness and increased appetite or weight gain. The gums replace some of the nicotine provided by tobacco and help reduce the severity of these nicotine craving and withdrawal symptoms.

5.2 Pharmacokinetic properties

Absorption

Nicotine administered in chewing gums is readily absorbed from the buccal mucous membranes. Demonstrable blood levels are obtained within 5 - 7 minutes and reach a maximum about 30 minutes after the start of chewing. Blood levels are roughly proportional to the amount of nicotine chewed and have been shown never to exceed those obtained from smoking cigarettes.

Distribution

As the plasma protein binding of nicotine is low (4.9 % - 20 %), the volume of distribution of nicotine is large (2.5 l/kg). The distribution of nicotine to tissue is pH dependent, with the highest concentrations of nicotine found in the brain, stomach, kidney and liver. Nicotine crosses the blood-brain barrier, the placenta and is detectable in breast milk.

Biotransformation

Nicotine is extensively metabolized to a number of metabolites, all of which are less active than the parent compound. The metabolism of nicotine primarily occurs in the liver, but also in the lung and kidney. Nicotine is metabolized primarily to cotinine but is also metabolized to nicotine N’-oxide. Cotinine has a half-life of 15-20 hours and its blood levels are 10 times higher than nicotine. Cotinine is further oxidized to trans-3’-hydroxycotinine, which is the most abundant metabolite of nicotine in the urine. Both nicotine and cotinine undergo glucuronidation.

Elimination

The elimination half-life of nicotine is approximately 2 hours (range 1 - 4 hours). Total clearance for nicotine ranges from approximately 62 to 89 l/hr. Non-renal clearance for nicotine is estimated to be about 75 % of total clearance. Nicotine and its metabolites are excreted almost exclusively in the urine. The renal excretion of unchanged nicotine is highly dependent on urinary pH, with greater excretion occurring at acidic pH.

5.3 Preclinical safety data

The general toxicity of nicotine is well known and taken into account in the recommended posology. Nicotine was not mutagenic in appropriate assays. The results of carcinogenicity assays did not provide any clear evidence of a tumorigenic effect of nicotine. In studies in pregnant animals, nicotine showed maternal toxicity, and consequential mild fetal toxicity. Additional effects included pre-and post natal growth retardation and delays and changes in post-natal CNS development.

Studies in female rodents have shown that nicotine can decrease the number of oocytes in the fallopian tubes, decrease the concentration of serum estradiol, and result in a number of changes to the ovaries and uterus. Studies in male rats have shown that nicotine can decrease testis weight, cause a reversible decrease in Sertoli cell numbers with impairment of spermatogenesis, and result in a variety of changes in the epididymis and vas deferens.

Effects were only noted following exposure to nicotine at levels in excess of those which will result from recommended use of Nicabate Extra. Mint Gum. There are no other pre-clinical data of relevance.

6 PHARMACEUTICAL PARTICULARS

6.1 List of excipients Gum core

Gum Base 25048 (incl. 0.09 %w/w Butylated hydroxytoluene (E321) Sorbitol (E420)

Xylitol (E967)

Calcium Carbonate (E170)

Sodium Carbonate Anhydrous (E500)

Eucamenthol Flavour

Glycerol (E422)

Levomenthol Optacool Flavour Acesulfame Potassium (E950) Sucralose (E955)

Gum Coating

Xylitol (E967)

Mannitol (E421)

Acacia (E414)

Titanium Dioxide (171) Levomenthol Eucamenthol Flavour Optacool Flavour Sucralose (E955)

6.2    Incompatibilities

Not applicable.

6.3    Shelf life

2 years

6.4    Special precautions for storage

Do not store above 25°C. Store in the original package.

6.5    Nature and contents of container

20 micron aluminium blister film. The blister film is a clear thermoformable blister film, consisting either of 250 micron polyvinyl chloride (PVC) and 90 g/m² polyvinylidene chloride (PVdC) (duplex) or of 250 micron polyvinyl chloride (PVC), 30 micron polyethylene (PE) and 90 g/m polyvinylidene chloride (PVdC) (triplex).

The aluminium sealing side of the aluminium foil is coated with a vinyl based lacquer which seals to the PVdC side of the blister film

Nicabate Extra Fresh Mint Gum is available in packs of 4, 10, 30, 100 and 200

Not all pack sizes may be marketed.

6.6    Special precautions for disposal

Any unused medicinal product or waste material should be disposed of in accordance with local requirements.

7 MARKETING AUTHORISATION HOLDER

Beecham Group PLC

Trading as GlaxoSmithKline Consumer Healthcare

980 Great West Road

Brentford

Middlesex TW8 9GS United Kingdom

8    MARKETING AUTHORISATION NUMBER(S)

PL 00079/0724

9    DATE OF FIRST AUTHORISATION/RENEWAL OF THE AUTHORISATION

08/05/2015

10 DATE OF REVISION OF THE TEXT

08/05/2015