Gabapentin 600 mg is commonly prescribed for nerve pain, seizures, and certain anxiety disorders, but it can come with several side effects. Users may experience dizziness, drowsiness, fatigue, or problems with coordination, especially when first starting the medication. Other common side effects include swelling in the hands or feet, blurred vision, and mood changes. In rare cases, gabapentin 600 mg may lead to more serious effects such as difficulty breathing, allergic reactions, or unusual thoughts. It's important to monitor how your body responds and consult a healthcare provider if symptoms become severe or persistent.