If you’ve missed a dose of fluoxetine, take the prescribed amount as soon as you remember, unless it’s close to the time of your next dose. If it’s close to the time of your next dose, simply take the next dose as prescribed — never double your dose.You may also experience withdrawal syndrome following abrupt discontinuation of fluoxetine — onset of symptoms can be between one to 10 days. You’re also at an increased risk if you’re taking a higher dose of fluoxetine. Signs of withdrawal syndrome include:DizzinessChillsLight headednessVertigoShock-like sensationsParesthesia (numbness or burning)FatigueHeadacheNauseaTremorsDiarrheaVisual disturbanceAnxietyAgitationConfusionInsomniaIrritabilityMania