Previous next Report Problems to the Food and Drug Administration You are encouraged to report negative side effects of prescription drugs to the FDA. Advertisement Most important fact about Valium Return to top Valium can be habit-forming or addictive. No increased risk has been shown for adults over age 24, and risk decreased for those over age 65. Shakiness, trouble sleeping, muscle cramps, vomiting, sweating, seizures, mental mood changes such as anxiety agitation may occur if you suddenly stop this drug. As is true of most CNS-acting drugs, lorazepam replaced by diazepam patients receiving Valium should be cautioned against engaging in hazardous occupations requiring complete mental alertness, such as operating machinery or driving motor vehicle. Do not use this medication without telling your doctor if you are breast-feeding baby.