 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  promptly. Common nicotine withdrawal symptoms can occur when you stop smoking and include dizziness, anxiety, depression, or trouble sleeping, among others. Chewing the gum too fast can cause lightheadedness, dizziness, hiccups, nausea, vomiting, or trouble sleeping. If these effects occur, chew the gum more slowly. If your doctor has directed you to use this medication, remember that your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Serious side effects are more likely if you continue to smoke while using this product. Stop using this medication and tell your doctor right away if you have any serious side effects, including: severe dizziness, mental/mood changes (such as irritability, trouble sleeping, vivid dreams), numbness/tingling in hands/feet, swelling hands/ankles/feet. Stop using this medication and get medical help right away if you have any very serious side effects, including: chest pain, confusion, severe headache, fast/irregular/pounding heartbeat, trouble speaking, weakness on one side of the body. A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms </s>