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Antidepressants

Antidepressants is an umbrella term for a wide range of pharmaceutical drugs that share the fact that they are used in the treatment of major depressive disorder. They come in different forms, including selective serotonin reuptake inhibitors (SSRIs), serotonin-norepinephrine reuptake inhibitors (SNRIs), tricyclic antidepressants (TCAs), and monoamine oxidase inhibitors (MAOIs). Their main indication is the treatment of depression, but many of them are also used to treat other psychiatric conditions such as anxiety or obsessive-compulsive disorder (OCD). Furthermore, some of these agents can also be used "off-label" to help with other conditions, such as nerve pain, dysmenorrhea and a plethora of other disorders and conditions.

[top]Using Antidepressants

[top]Ways of administration

[top]Effects of Antidepressants

Most antidepressants have a delayed onset of action, and can take anywhere from 4-6 weeks to cause any noticeable improvements.There are 3 main types of antidepressants that are commonly prescribed and their effects vary from one type to the other:

SSRIs
SSRI stands for Selective Serotonin Reuptake Inhibitor and include drugs like Fluoxetine (Prozac) and Paroxetine (Paxil). They work by increasing the amount of serotonin in the synapse, by decreasing the amount that is re-uptaken or "recicled" back to the presynaptic neuron.Thus, the amount of available serotonin is increased.

SSRIs are commonly used as the first line treatment for depression since they have a low toxicity and a favorable side-effect profile.Work done in 2005 by Dr. Jeffrey R. Lacasse and Dr. Johnathan Leo at the Florida State University College of Social Work, calls into question the link between serotonin deficiency and symptoms of depression, noting that the efficacy of SSRIs as treatment does not in itself prove the link, also describing concerns about the psychological effect of oversimplified, pseudo-scientific anti-depressant advertising on the public.(1).


TRICYCLIC ANTIDEPRESSANTS

These include amytriptilline, comipramine and Desipramine and are the second oldest type of antidepressants. They are now rarely prescribed in favor of safer, more selective drugs, although they are still used because of their effectiveness, specially in severe cases of major depression. They work by blocking the reuptake of neurotransmitters such as serotonin and norepinephrine and have a wide range of side-effects including increased heart rate, drowsiness, dry mouth, constipation, urinary retention, blurred vision, dizziness, confusion, and sexual dysfunction.

They are also usually lethal in overdose, and have a narrow therapeutic window, with aproxiamtely 10 times the normal dose causing toxicity.


MONOAMINE OXIDASE INHIBITORS

This group includes drugs like Isocarboxazid (Marplan), Moclobemide (Aurorix) and Phenelzine (Nardil).They work by inhibiting the enzyme monoamine oxidase, which metabolizes neurotransmitters involved in depression, such as dopamine, serotonin and norepinephrine.

MAOIs are rarely prescribed anymore due to their dangerous interactions with certain foods and drugs, although a new generation of MAOIs has been introduced; moclobemide (Manerix), known as a reversible inhibitor of monoamine oxidase A (RIMA), which is as effective as SSRIs and tricyclic antidepressants, in depressive disorders, and does not require a special diet.

[top]Combinations with Antidepressants

The combination of serotonergic antidepressants such as SSRIs with drugs affecting serotonin such as MDMA, tryptamines, triptans, MAOIs, etc. can lead to a condition known as Serotonin Syndrome which can be potentially life threatening and is contradicted in all accounts.

SNRIs

SNRI stands for Serotonin-norepinephrine Reuptake Inhibitor and includes drugs such as Duloxetine (Cymbalta), Venlafaxine (Effexor XR) and Desvenlafaxine (Pristiq). SNRI's are slightly different to SSRI's in that they aim to balance the levels of both serotonin and norepinephrine in the neuron.

[top]Different Uses for Antidepressants

[top]The dangers of Antidepressants



[top]Introduction to Antidepressants





[top]Using Antidepressants

[top]Ways of Administration

[top]Effects of Antidepressants

[top]Combinations with Antidepressants

[top]Different Uses for Antidepressants




[top]Pharmacology of Antidepressants




[top]Chemistry of Antidepressants




[top]The Dangers of Antidepressants




[top]Producing/Growing Antidepressants




[top]Forms of Antidepressants




[top]Legal Status of Antidepressants

[top]United Nations

[top]USA

[top]EU

[top]Other Countries




[top]History of Antidepressants




[top]More Antidepressants Sections




[top]The Latest Antidepressants Threads


  Article / Page Starter Last Post Comments Views
Alfa
13-06-2014 14:30
by BitterSweet Go to last post
7 2,115
Wanderer
21-05-2014 18:53
by Beenthere2Hippie Go to last post
8 12,561
NeuroChi
03-05-2014 15:33
by John_bob Go to last post
3 36,527
Alfa
01-05-2014 20:45
by John_bob Go to last post
6 98,602
Wanderer
27-04-2014 13:08
by John_bob Go to last post
1 17,322
NeuroChi
20-04-2014 22:06
by John_bob Go to last post
10 53,463
Alfa
20-04-2014 18:40
by John_bob Go to last post
1 15,893
Coconut
24-03-2014 17:06
by Calliope Go to last post
42 196,434
NeuroChi
19-01-2014 10:11
by tachyon4 Go to last post
10 134,379
syntheticdave
13-12-2013 20:42
by syntheticdave Go to last post
0 1,127





[top]References

[top]Forms of Antidepressants

[top]History of Antidepressants


[top]More Antidepressants Sections

[top]The latest Antidepressants threads

[top]References


[top]Pages in category "Antidepressants"

There are 14 pages in this section of this category.

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Created by Alfa, 30-08-2009 at 16:01
Last edited by kcha95, 08-03-2014 at 00:19
Last comment by John_bob on 20-04-2014 at 18:40
1 Comments, 15,893 Views

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