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  1. Use WebMD’s Drug Interaction Checker tool to find and identify potentially harmful and unsafe combinations of prescription medications by entering two or more drugs in question.

  2. 2023年6月24日 · Use WebMD’s Pill Identifier to find and identify any over-the-counter or prescription drug, pill, or medication by color, shape, or imprint and easily compare pictures of multiple drugs.

  3. 2023年7月18日 · Men: 30s and Early 40s. Many men continue to have a strong sex drive through these years, though testosterone starts to slowly decrease around age 35. It typically goes down by about 1% per year ...

    • Pharmacology
    • Synthesis
    • Function
    • Pathophysiology
    • Causes

    Serotonin acts as a neurotransmitter, a type of chemical that helps relay signals from one area of the brain to another. Although serotonin is manufactured in the brain, where it performs its primary functions, some 90% of our serotonin supply is found in the digestive tract and in blood platelets.

    Serotonin is made via a unique biochemical conversion process. It begins with tryptophan, a building block to proteins. Cells that make serotonin use tryptophan hydroxylase, a chemical reactor which, when combined with tryptophan, forms 5-hydroxytryptamine, otherwise known as serotonin.

    As a neurotransmitter, serotonin helps to relay messages from one area of the brain to another. Because of the widespread distribution of its cells, it is believed to influence a variety of psychological and other body functions. Of the approximately 40 million brain cells, most are influenced either directly or indirectly by serotonin. This includ...

    There are many researchers who believe that an imbalance in serotonin levels may influence mood in a way that leads to depression. Possible problems include low brain cell production of serotonin, a lack of receptor sites able to receive the serotonin that is made, inability of serotonin to reach the receptor sites, or a shortage in tryptophan, the...

    One theory about how depression develops centerson the regeneration of brain cells -- a process that some believe is mediated by serotonin, and ongoing throughout our lives. According to Princeton neuroscientist Barry Jacobs, PhD, depression may occur when there is a suppression of new brain cells and that stress is the most important precipitator ...

  4. 2024年7月22日 · Find patient medical information for Nitrofurantoin on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings

  5. 2022年12月16日 · Masturbation is the self-stimulation of the genitals to achieve sexual arousal and pleasure, usually to the point of orgasm (sexual climax). It is commonly done by touching, stroking, or massaging...

  6. Body mass index (BMI) estimates how healthy your weight is based on your height. There's no "perfect weight" that fits everyone, but BMI can help most adults understand their weight-related health...

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