Prozac is usually taken in the morning after breakfast, which seems to produce fewer side effects, particularly nausea and insomnia. But some patients have been able to tolerate it with other meals or at other times of the day, including bedtime, without adverse side effects. Many patients take Prozac at a time when it is most convenient for them or simply easy to remember, whether in the morning, after dinner, or at bedtime.
Can you overdose on Prozac? Not easily. During preclinical trials with Prozac up to 1993, no deaths occurred in patients receiving Prozac in normal doses. Two deaths were reported during comparative clinical trials, but in both cases other drugs were involved, so the role of Prozac is not clear. Another thirty-two patients recovered after overdose without any lasting harm, including one who reportedly took 3000 mg of Prozac, which is over thirty-seven times the recommended maximum dose of 80 mg.
In contrast, it is easy to overdose with other antidepressants such as the TCAs and MAOIs due to the toxic effects of high doses on the heart. With Prozac, even in large amounts, the risk of serious cardiovascular or neurologic harm is very small. Prozac should be considered one of the safest of all the antidepressant drugs.
If I will take a capsule by mistake, will it hurt me? No. A single dose of Prozac should not hurt a healthy person. The possible side effects and risks of using Prozac in small doses in conjunction with tricyclic and tetracyclic antidepressants appear to be minimal. However, the use of Prozac with MAOI antidepressants such as Nardil, Parnate or Marplan is considered dangerous. Prozac taken by mistake with an MAOI could conceivably cause a toxic reaction with elevated blood pressure, nausea, vomiting, or shock. Immediate transport to an emergency ward is indicated if such symptoms follow. A patient switching from an MAOI to Prozac must wait at least two weeks. A patient switching from Prozac to an MAOI must wait at least five weeks. Failure to observe these precautions can result in severe toxic reactions and even death.
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