When depression symptoms improve after starting an antidepressant, many people need to continue taking medication long term to prevent symptoms from returning. Takhzyro (lanadelumab-flyo) is a monoclonal antibody that works by reducing the activity of an enzyme that is uncontrolled in people with hereditary angioedema (a rare genetic immune system disorder). Fluoxetine is a prescription drug. It comes as a capsule, delayed-release capsule, tablet, and solution. All forms are taken by mouth. (A delayed-release capsule is released into your body more. This sheet talks about using fluoxetine in pregnancy and while breastfeeding. This information should not take the place of medical care and advice from your healthcare provider. You can drink some alcohol while taking fluoxetine. You can continue to drink some alcohol while taking fluoxetine, but it is best to keep it in moderation. The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication. Like all medicines, fluoxetine can cause side effects in some people, but many people have no side effects or only minor ones. Some of the common side effects of fluoxetine will gradually improve as your body gets used to it. Uses. Fluoxetine is used to treat depression, panic attacks, obsessive compulsive disorder, a certain eating disorder , and a severe form of premenstrual syndrome (premenstrual dysphoric disorder). Updated 3/2019. How long it takes for a medication to leave your body depends on its dose, and its metabolism. But you may be asking how long it takes for the medication’s effects to go away. Upset. Prednisone does cause depression, as well stays in your system for a long time, but since you were on it a short time it could maybe stay in your body for about 2 to 3 weeks.