Effects of Smoking Cessation
Some symptoms may be related to nicotine withdrawal associated with stopping smoking. These can include: irritability/aggression, frustration/anger, dysphoria/depressed mood, anxiety, restlessness, poor concentration, increased appetite/weight gain, urges to smoke (cravings), night-time awakenings/sleep disturbance, decreased heart rate, dizziness, presyncopal symptoms, cough, constipation, gingival bleeding or nasopharyngitis.
Increased frequency of aphthous ulcer may occur after stopping smoking. The causality is unclear.
Effects of Vaping Cessation
The nicotine withdrawal effects of vaping cessation have not been established; however it is anticipated that many of the effects relating to nicotine withdrawal will be the same as those seen with tobacco smoking cessation.
Adverse Drug Reactions
This product may cause adverse reactions similar to those associated with nicotine given by other means, including smoking and vaping, and these are mainly dose-dependent. At recommended doses this product has not been found to cause any serious adverse effects. Excessive consumption of this product by those who have not been in the habit of inhaling tobacco smoke or vaping could possibly lead to nausea, faintness or headaches.
Most of the undesirable effects reported by the patient occur during the first 3-4 weeks after start of treatment. During the first few days of treatment irritation in the mouth and throat may be experienced. Most patients will get used to this sensation after the first few days.
Allergic reactions (including symptoms of anaphylaxis) can occur during the use of the product.
The adverse reactions observed in patients treated with oral nicotine formulations during clinical trials and post-marketing experience are listed below by system organ class (SOC).
Frequencies are defined in accordance with current guidance as: very common (≥1/10); common (≥1/100, <1/10); uncommon (≥1/1 000, <1/100); rare (≥1/10 000, <1/1 000); very rare (<1/10 000); not known (cannot be estimated from the available data).
| Body System | Reported adverse event (Preferred Term) | Incidence |
| Immune system disorders | Hypersensitivitya | Common |
| Anaphylactic reactiona | Not known |
| Psychiatric disorders | Abnormal dreams* | Uncommon |
| Nervous system disorders | Headachea# | Very common |
| Burning sensationc | Common |
| Dizziness | Common |
| Dysgeusia | Common |
| Paraesthesiaa | Common |
| Seizures | Not known |
| Eye disorders | Blurred vision | Not known |
| Lacrimation increased | Not known |
| Cardiac disorders | Palpitationsa | Uncommon |
| Tachycardiaa | Uncommon |
| Atrial fibrillation | Very rare |
| Vascular disorders | Flushinga | Uncommon |
| Hypertensiona | Uncommon |
| Respiratory, thoracic and mediastinal disorders | Cough** | Common |
| Sore mouth or throat | Very common |
| Throat irritation** | Very common |
| Bronchospasm | Uncommon |
| Dysphonia | Uncommon |
| Dyspnoeaa | Uncommon |
| Nasal congestion | Uncommon |
| Sneezing | Uncommon |
| Throat tightness | Uncommon |
| Gastrointestinal disorders | Hiccups**** | Very common |
| Nauseaa | Very common |
| Abdominal pain | Common |
| Diarrhoea*** | Common |
| Dry mouth | Common |
| Dyspepsia | Common |
| Flatulence | Common |
| Salivary hypersecretion | Common |
| Stomatitis | Common |
| Vomitinga | Common |
| Eructation | Uncommon |
| Glossitis | Uncommon |
| Oral mucosal blistering and exfoliation | Uncommon |
| Paraesthesia oral*** | Uncommon |
| Dysphagia | Rare |
| Hypoaesthesia oral*** | Rare |
| Retching | Rare |
| Dry throat | Not known |
| Gastrointestinal discomforta | Not known |
| Lip pain | Not known |
| Musculoskeletal and connective tissue disorders | Pain in Jawb | Uncommon |
| Muscle tightnessb | Not known |
| Skin and Subcutaneous Tissue Disorders | Hyperhidrosisa | Uncommon |
| Pruritusa | Uncommon |
| Rasha | Uncommon |
| Urticariaa | Uncommon |
| Erythemaa | Not known |
| General disorders and administration site conditions | Fatiguea | Common |
| Astheniaa | Uncommon |
| Chest discomfort and paina | Uncommon |
| Malaisea | Uncommon |
| Allergic reactions including angioedema | Rare |
a Systemic effects;
b Tightness of jaw and pain in jaw with nicotine gum formulation
c At the application site
*Identified only for formulations applied during the night
**Higher frequency observed in clinical studies with inhaler formulation.
***Reported the same or less frequently than placebo
****Higher frequency observed in clinical studies with mouth spray formulation
# Although the frequency in the active group is less than that of the placebo group, the frequency in the specific formulation in which the PT was identified as a systemic ADR was greater in the active group than the placebo group.
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 or search for MHRA Yellow Card in the Google Play or Apple App Store.