Did anyone have side effects? ## Hello, Terry! How are you? Every medication carries the risk of causing side effects, even over the counter products, however, not everyone experiences them. The only way to find out whether or not you will is by actually trying the medication. Side effects to this one may include nausea, insomnia, decreased appetite and headache. Is there anything else I can help with? ## What is the typical dosage for Felbatol with a 100lb woman?