0.4. 0.5. phenytoin. (Dilantin) 8.3. 6.9. "Bottom line": the rate of serious rash in this analysis is between 2 and 4 cases per 10,000 new users of lamotrigine (the manufacturer's usual quoted rate is higher: 1 per 1,000). The rate in several other commonly used antiseizure medications is somewhat lower, except for Dilantin. Just because a side effect is stated here doesn't mean that all people taking lamotrigine will experience that or any side effect. Very common side effects (affect more than 1 in 10 people) Headache. back pain, sore throat, runny nose, or. sleep problems (insomnia). Serious side effects of Lamictal you should report to your doctor include: rash, worsening depression or suicidal thoughts, and. flu-like symptoms such as body aches or swollen glands. Lamictal may cause serious side effects including:. The most common treatment of a lamotrigine overdose is supportive treatment, meaning that side effects and symptoms are managed as quickly as possible. In most cases, vomiting should be induced in. Just because a side effect is stated here doesn't mean that all people taking lamotrigine will experience that or any side effect. Very common side effects (affect more than 1 in 10 people) Headache. People who are taking lamotrigine and nursing their child can watch for possible side effects, such as trouble breathing, a rash, sleepiness, or poor sucking. If the baby develops a rash, or other symptoms, talk with your healthcare providers right away about if you should discontinue breastfeeding, as a rash could be a sign of toxicity.. I have suffered minimal side effects from the prozac In a nutshell, the poster’s therapist advised them to think of someone they really dislike and imagine that all of the negative thoughts and worries are being spoken aloud by. Side-effects are unwanted symptoms caused by medicines. All medicines can cause side-effects, including epilepsy medicines. ... Some types of contraception make the epilepsy medicine lamotrigine work less effectively. This could lead to an increase in your seizures. Visit our section on contraception to find out more.