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Sexual side effects. Some antidepressants, including commonly prescribed ones from the class known as SSRIs (selective serotonin reuptake inhibitors), can cause sexual side effects such as ...
Because the SNRIs and SSRIs act in similar ways to elevate serotonin levels, they share many side effects, though to varying degrees. The most common side effects include nausea/vomiting, sweating, loss of appetite, dizziness, headache, increase in suicidal thoughts, and sexual dysfunction. [70]
The dose should be increased after a minimum of 3 days up to approximately 1.2 mg/kg daily (target dose) as a single or two divided doses (in the morning and late afternoon). For children older than 6 years old, over 70 kg, acute treatment should be started with 40 mg/day orally and increased up to 80 mg/day after a minimum of 3 days.
Many of these symptoms may be side effects of the drug or drug interaction causing excessive levels of serotonin rather than an effect of elevated serotonin itself. Tremor is a common side effect of MDMA's action on dopamine, whereas hyperreflexia is symptomatic of exposure to serotonin agonists.
This side effect has been particularly associated with serotonergic antidepressants like SSRIs and SNRIs, but may be less with atypical antidepressants like bupropion, agomelatine, and vortioxetine. [ 83 ] [ 85 ] [ 86 ] Higher doses of antidepressants seem to be more likely to produce emotional blunting than lower doses. [ 83 ]
For example, cocaine, which non-selectively inhibits the reuptake of serotonin, norepinephrine, and dopamine, is an SRI but not an SSRI. SRIs are used predominantly as antidepressants (e.g., SSRIs, SNRIs, and TCAs), though they are also commonly used in the treatment of other psychological conditions such as anxiety disorders and eating disorders.
Reboxetine, sold under the brand name Edronax among others, is a selective norepinephrine reuptake inhibitor (sNRI) medication marketed as an antidepressant by Pfizer for use in the treatment of major depressive disorder, although it has also been used off-label for panic disorder and attention deficit hyperactivity disorder (ADHD). [4]
Although SSRIs arrive rapidly to the brain after administration and the effects on 5-HT re-uptake can be measured instantly, it takes about 2–4 weeks to get therapeutic effects. [16] The SSRIs have very high and selective affinity for SERT and after administration they inhibit SERT immediately.