PATIENT TEACHING AID - U.S. Pharmacist
[Pages:2]TEARALONGPERFORATION
PATIENTTEACHINGAID
SSRIs
Normal function
Presynaptic nerve ending
SSRI mechanism
Vesicle contains serotonin
1) Serotonin is released into synapse
4) Serotonin reuptake
5) SSRI blocks serotonin reuptake
2) Serotonin attaches to receptor sites
3) Nerve is stimulated
Postsynaptic nerve ending
6) Serotonin builds up in synapse
and continues to stimulate nerve
Migraine Anxiety
Depression
Most Commonly Used Antidepressants
Selective serotonin reuptake inhibitors, or SSRIs, are a group of drugs approved for use in the treatment of depression. Many of the medications in this category are also approved for use in anxiety disorders such as generalized anxiety, panic disorder, social anxiety, obsessive-compulsive disorder (OCD), and posttraumatic stress disorder (PTSD). SSRIs work by increasing the amount of serotonin in the brain. Serotonin is a brain chemical that improves mood. SSRIs are safer and have fewer side effects than older antidepressants. Unlike most antianxiety medications, they are not addictive. These medications have also shown activity in treating other conditions for which they are not currently approved, such as migraine and fibromyalgia.
Copyright Jobson Medical Information LLC, 2016
continued
PATIENTTEACHINGAID
? Jobson Medical Information LLC, 2016
Also Approved for the Treatment
Diabetic Neuropathy
of Anxiety Disorders
Reduced blood flow in occluded vessels blocked by plaque
Selective serotonin reuptake inhibitors (SSRIs) are the most frequently
prescribed antidepressants. SSRIs are called selective because they
affect serotonin rather than other chemicals in the brain. These
drugs block the reuptake (removal) of serotonin, which keeps the level of serotonin balanced and helps regulate mood.
SSRIs Affect Serotonin Levels in the Brain There are currently seven SSRI drugs on the market in the United
Damaged nerve fibers and myelin sheath caused by lack of normal blood supply
States (TABLE 1). These medications are generally safer than older
antidepressants, with fewer side effects and drug interactions. In
general, SSRIs have received approval from the FDA as safe and
effective in the treatment of major depressive disorder. Many are also approved for anxiety disorders such as panic disorder, generalized anxiety disorder, and social anxiety disorder. Certain drugs in this category are also approved for use in obsessive-compulsive disorder
SSRIs may be prescribed off-label for various conditions, such as diabetic neuropathy.
(OCD), posttraumatic stress disorder (PTSD), premenstrual dysphoric disorder (PMDD), and bulimia.
SSRIs are slightly different in how quickly they work and how long they stay in the body. Their
side effects also differ somewhat. Common side effects include nervousness, problems sleeping, headache,
dry mouth, nausea, changes in sexual desire, and erectile dysfunction. Nausea can be reduced by taking
the medicine with food. Nervousness and insomnia can be reduced by taking the drug just before bedtime. Most adverse effects of SSRIs gradually disappear after a few weeks of therapy.
SSRIs show an effect after 4 to 6 weeks of daily use. If one drug in this category does not work in a particular person, another drug may work.
SSRIs can interact with other medications that also cause increased serotonin levels in the brain. These include other antidepressants, prescription opioids, migraine medications, cocaine, and St. John's wort (a medicinal herb used to treat depression). If one or more of these drugs are used with
an SSRI, a high level of serotonin in the brain can result in serotonin syndrome. Symptoms such as
extreme anxiety, tremors, fast heartbeat, sweating, and confusion require emergency care.
Although SSRIs are not addictive, stopping them abruptly can cause symptoms that mimic withdrawal.
A doctor should provide guidelines for slowly tapering off an
SSRI to avoid symptoms of nausea, dizziness, and fatigue.
Table 1. FDA-Approved SSRIs
Warnings and Precautions Generally, SSRIs are safe and carry few risks. All antidepressants, including SSRIs, can cause an increase in suicidal thoughts or actions, especially in young adults beginning therapy or changing dosages. SSRIs can increase the risk of gastrointestinal bleeding when taken with nonsteroidal anti-inflammatory drugs (NSAIDs), such as aspirin or ibuprofen, or with drugs with a side effect of bleeding, such as warfarin. Taking a drug that lowers stomach acid may be helpful. Women who are considering pregnancy, who are pregnant, or who are breastfeeding should discuss the potential effects of SSRIs on the fetus or infant and consider a break in therapy to avoid exposure.
Several SSRIs are being studied for diseases other than those specified in their FDA labeling. Some of the uses that have shown promise include prevention of migraine, pain of diabetic neuropathy, fibromyalgia, vasovagal syncope (fainting), and premature ejaculation.
Generic
Trade Approved Name Uses
Citalopram Celexa Depression
Escitalopram Lexapro Depression,
generalized anxiety
Fluoxetine Prozac Depression, OCD,
bulimia, panic disorder
Sarafem PMDD
Fluvoxamine Luvox OCD
Paroxetine Paxil
Depression, OCD, generalized anxiety, panic disorder, social anxiety, PTSD
Sertraline Zoloft
Depression, OCD, panic disorder, social anxiety, PTSD, PMDD
Vilazodone Viibryd Depression
OCD: obsessive-compulsive disorder; PMDD: premenstrual dysphoric disorder; PTSD: posttraumatic stress disorder; SSRI: selective serotonin reuptake inhibitor.
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