I don't want you fainting and breaking your neck or something.
About 25 percent of affected children-particularly those who experience pallid BHS-have a family history of BHS or fainting.
Fainting, nausea, or feeling lightheaded after venipuncture may occur in some children.
Up to 17 percent of children with pallid BHS will experience syncope (fainting spells) as adults, usually in response to fear, injury, or emotional stress.
Other side effects include dizziness, fainting, headache, tremors, muscle twitching, confusion, memory impairment, anxiety, agitation, insomnia, weakness, drowsiness, chills, blurred vision, and heart palpitations.
