Ptolemy-An ancient Greek astronomer and mathematician, Ptolemy's geocentric views on the structure of the universe dominated astronomy until the Scientific Revolution. Santorio Santorio-Santorio (1561-1636) was one of the first to apply the evolving physical philosophy of the Scientific Revolution to animal biology.
2 doctors agreed: A while: Since you took prozac/fluoxetine for only 4 days, it should leave your system in about 1 - 2 weeks completely. In general, if someone has been taking Prozac for a while (longer than two weeks), it can take up to 5 weeks to completely wash it out of ones system.
Assuming you fully quit taking the drug, you may start to notice Prozac withdrawal symptoms slowly emerge within 2 to 4 weeks after discontinuation. Though Prozac is considered among the easiest antidepressants to discontinue due to its long half-life, it also stays in your system for a long time after stopping.