<b>Anti-depressants</b>
<br>Antidepressants are grouped into classes based on how they affect the chemistry of the brain. While the antidepressants in a class will tend to have similar side effects and mechanisms of action, there are differences in their molecular structures which can influence how well the drug is absorbed, disseminated, or tolerated in different people.
There are three basic molecules, known chemically as monoamines, that are believed to be involved in mood regulation. These primarily work as neurotransmitters, which literally transmit nerve signals to their corresponding receptors in the brain. Antidepressants work by influencing these neurotransmitters, which include:

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<li><b>Serotonin</b>, the neurotransmitter whose role it is to regulate mood, appetite, sleep, memory, social behavior, and sexual desire<br><br><p style="text-align: center;"><img src="http://via.placeholder.com/600x260" alt="" width="600" height="260" role="presentation" class="img-responsive atto_image_button_text-bottom" style="font-size: 1rem;"></p></li></ul>
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<li><b>Norepinephrine</b>, which influences alertness and motor function and helps regulate blood pressure and heart rate in response to stress<br><br><p style="text-align: center;"><img src="http://via.placeholder.com/600x260" alt="" width="600" height="260" role="presentation" class="img-responsive atto_image_button_text-bottom" style="font-size: 1rem;"></p></li></ul>
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<li><b>Dopamine</b>, which plays a central role in decision-making, motivation, arousal, and the signaling of pleasure and reward<br><br><p style="text-align: center;"><img src="http://via.placeholder.com/600x260" alt="" width="600" height="260" role="presentation" class="img-responsive atto_image_button_text-bottom" style="font-size: 1rem;"></p></li></ul>