Had my prozac (fluoxetine) prescribed for anxiety stopped working or do i need to change the dose?

Chk dose., Time used: Some patient may experience increase energy or activation early after initiating of txmt. Onset of action usually delayed 2-4 wees. If your dose has been adjusted gradually and the medication is not working with 6 to 8 weeks , it may require a dosege incras or it may not be working at all. In some cases it continues for many years to prevent relapse of symptoms. Consider re-visiting psychiatrist.