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Antidepressants are prescription medicines to treat depression. Depression is more than feeling a little sad or "blue" for a few days. It's a very common, serious medical illness that affects your mood and general mental health It can make you feel tired, hopeless, worried, or fearful. It can change your thinking, sleeping, and eating. Depression may make some people think about ending their lives.

But antidepressants can help many people who have depression. Researchers think antidepressants may help improve the way your brain uses certain chemicals that control mood or stress.

A health care provider may prescribe antidepressants for anxiety, chronic pain, or insomnia. Sometimes providers also prescribe antidepressants for other conditions.

There are many types of antidepressants. Each one works differently. Providers usually prescribe newer antidepressants first because they don't cause as many side effects as older types. They also seem to help more kinds of depression and anxiety problems.

Most of the newer antidepressants belong to one of these three groups:

• Selective serotonin reuptake inhibitors (SSRIs)
• Serotonin and norepinephrine reuptake inhibitors (SNRIs)
• Atypical antidepressants, which are newer antidepressants that don't fit into the other groups

If these antidepressants don't help, your provider might suggest one of the older antidepressants. The older types include tricyclic antidepressants (TCAs), tetracyclics, and monoamine oxidase inhibitors (MAOIs). Even though these antidepressants may cause more serious side effects, the benefits may outweigh the risks for some people.

Our bodies and brains all work differently. That means one antidepressant won't work for everyone. You may need to try two or more medicines before you find one that works for you.

Your provider will work with you to choose the best option to try first. You'll consider questions such as:

• Which symptoms bother you most? Some antidepressants may do a better job helping specific symptoms, such as trouble sleeping.
• What other medicines and supplements do you take? Some antidepressants can cause problems if you take them with certain medicines and herbs.
• Did a certain antidepressant work well for a close relative? An antidepressant that helped a parent, brother, or sister could be a good choice for you, too.
• Do you have other health conditions? Certain antidepressants can make some other conditions better or worse. Any other conditions that you have will be part of choosing your depression treatment.
• Are you pregnant, planning for pregnancy, or breastfeeding? If so, your provider will help you find a way to treat your depression that's safe for you and your baby.

Antidepressants usually take 4 to 8 weeks to work, so you'll need to be patient. You may notice that some problems, such as sleeping and eating, get better before your mood improves. That's a good sign. You may just need to give the medicine a little more time to do its job.

Sometimes an antidepressant helps at first, but symptoms return while you're still taking it. But there's usually another one you can try. To get more relief from depression, your provider may suggest combining two antidepressants, using another kind of medicine with an antidepressant, or adding talk therapy or other approaches to improve your mental health.

When an antidepressant starts to work, you and your provider can decide how long you need to stay on it. The typical length of treatment is 6 to 12 months, but some people may stay on antidepressants for much longer.

Not everyone has side effects from antidepressants. But if you do have them, they're usually mild and may get better over time as your body gets used to the new medicine.

The most common side effects from antidepressants include:

• Nausea and vomiting
• Weight gain
• Diarrhea
• Sleepiness
• Sexual problems, such as a lack of desire or ability to have sex

When thinking about side effects, it's important to remember that there are also risks from not treating depression. Your provider can help you think through the pros and cons of all your options.

If you have any side effects from antidepressants, your provider may suggest ways to manage them while you wait to see if the antidepressant will work. If the side effects bother you too much, you may need to change antidepressants. But you should never change your dose or stop taking an antidepressant on your own.

If you have serious problems or notice any changes that worry you, such as new or worsening symptoms, unusual changes in your mood, or you start acting differently, call your provider right away.

In some cases, children, teenagers, and young adults under 25 may be more likely to think about hurting or killing themselves when starting antidepressants or when the dose is changed. Get medical help right away if this happens.

Antidepressants are generally safe when you use them correctly:

• Tell your provider about everything you take. That includes medicines, herbs, supplements, and over-the-counter medicines you take, such as pain relievers and decongestants. Be honest about recreational drugs and alcohol, too.
• Try to get all your medicines from the same pharmacy. That way the pharmacist can warn you and your provider if you take medicines that may cause problems when used together.
• Follow all instructions about how to take your medicine.
• Talk with your provider if side effects bother you.
• Never stop taking antidepressants without your provider's help. Stopping too fast may make depression come back. You could even make your condition worse. To stop antidepressants safely, you need to give your body time to get used to being without the medicine. Your provider can tell you the safest way to go off an antidepressant.

NIH: National Institute of Mental Health

Panic disorder is a type of anxiety disorder. It causes repeated panic attacks, which are sudden periods of intense fear, discomfort, or a sense of losing control. These attacks happen even though there is no real danger. They often cause physical symptoms. For example, you may have a rapid or pounding heartbeat and feel like you are having a heart attack.

If you have panic attacks, it doesn't mean you will develop a panic disorder. Many people only have one or two panic attacks in their lifetime and get better without treatment.

But some of the people who have panic attacks do develop panic disorder. They have repeated panic attacks. The attacks can happen as often as several times a day or as rarely as a few times a year. People with panic disorder often worry about having another attack. It may cause them to avoid places and situations where they had panic attacks in the past.

Panic disorder is not life-threatening, but it can be upsetting and affect your quality of life. And if it is not treated, it can sometimes lead to other health conditions, including depression and substance use disorders.

The cause of panic disorder is unknown. Researchers think that certain factors may play a role:

• Genetics - panic disorder sometimes runs in families. But no one knows for sure why some family members have it while others don't.
• Brain biology and chemistry.
• Your environment.
• Major stress.

Panic disorder is more common in women than men. It often starts in the late teens or early adulthood. Sometimes it starts when a person is under a lot of stress. People who have had trauma, especially in childhood, are more likely to develop panic disorder.

People with panic disorder may have:

• Sudden and repeated panic attacks of overwhelming anxiety and fear
• A feeling of being out of control or a fear of death during a panic attack
• An intense worry about another panic attack
• A fear or avoidance of places and situations where they had panic attacks in the past
• Physical symptoms during a panic attack, such as:
  • Pounding or racing heart
  • Sweating or chills
  • Trembling or shaking
  • Trouble breathing
  • The feeling that they are choking
  • Weakness or dizziness
  • Chest pain
  • Stomach pain or nausea

Panic attacks can happen anytime, without warning. They can last anywhere from a few minutes to over an hour.

To find out if you have panic disorder, your health care provider:

• Will ask about your medical history and symptoms
• May check if an unrelated physical problem is causing your symptoms, for example with:
  • A physical exam
  • Blood tests to check for thyroid problems and other possible conditions
  • Heart health tests
• May do a panic disorder test
• May refer you to a mental health provider for the panic disorder test or other types of psychological evaluations

Treatment for panic disorder usually includes one or more of the following:

• Talk therapy, also called psychotherapy or counseling, which can help you understand your feelings.
  • It may include cognitive-behavioral therapy (CBT), a type of talk therapy that helps you change your negative thoughts and how you react to things that cause you to feel anxiety.
• Medicines, including:
  • Antidepressants, such as selective serotonin reuptake inhibitors (SSRIs) and serotonin-norepinephrine reuptake inhibitors (SNRIs)
  • Anti-anxiety medicines

Your provider may also suggest that you follow a healthy lifestyle, which may help with panic disorder. It may include:

• Avoiding alcohol
• Reducing caffeine
• Eating regular meals
• Getting enough sleep
• Getting regular exercise

Joining a support group may also be helpful. Support groups can make you feel like you are not alone, and you may learn some new tips on how to cope.

NIH: National Institute of Mental Health

Carcinoid tumors are rare, slow-growing cancers. They usually start in the lining of the digestive tract or in the lungs. They grow slowly and don't produce symptoms in the early stages. As a result, the average age of people diagnosed with digestive or lung carcinoids is about 60.

In later stages the tumors sometimes produce hormones that can cause carcinoid syndrome. The syndrome causes flushing of the face and upper chest, diarrhea, and trouble breathing.

Surgery is the main treatment for carcinoid tumors. If they haven't spread to other parts of the body, surgery can cure the cancer.

Migraines are a recurring type of headache. They cause moderate to severe pain that is throbbing or pulsing. The pain is often on one side of your head. You may also have other symptoms, such as nausea and weakness. You may be sensitive to light and sound.

Researchers believe that migraine has a genetic cause. There are also a number of factors that can trigger a migraine. These factors vary from person to person, and they include:

• Stress
• Anxiety
• Hormonal changes in women
• Bright or flashing lights
• Loud noises
• Strong smells
• Medicines
• Too much or not enough sleep
• Sudden changes in weather or environment
• Overexertion (too much physical activity)
• Tobacco
• Caffeine or caffeine withdrawal
• Skipped meals
• Medication overuse (taking medicine for migraines too often)

Some people have found that certain foods or ingredients can trigger headaches, especially when they are combined with other triggers. These foods and ingredients include:

• Alcohol
• Chocolate
• Aged cheeses
• Monosodium glutamate (MSG)
• Some fruits and nuts
• Fermented or pickled goods
• Yeast
• Cured or processed meats

About 12% of Americans get migraines. They can affect anyone, but you are more likely to have them if you:

• Are a woman. Women are three times more likely than men to get migraines.
• Have a family history of migraines. Most people with migraines have family members who have migraines.
• Have other medical conditions, such as depression, anxiety, bipolar disorder, sleep disorders, and epilepsy.

There are four different phases of migraines. You may not always go through every phase each time you have a migraine.:

• Prodome. This phase starts up to 24 hours before you get the migraine. You have early signs and symptoms, such as food cravings, unexplained mood changes, uncontrollable yawning, fluid retention, and increased urination.
• Aura. If you have this phase, you might see flashing or bright lights or zig-zag lines. You may have muscle weakness or feel like you are being touched or grabbed. An aura can happen just before or during a migraine.
• Headache. A migraine usually starts gradually and then becomes more severe. It typically causes throbbing or pulsing pain, which is often on one side of your head. But sometimes you can have a migraine without a headache. Other migraine symptoms may include
• Increased sensitivity to light, noise, and odors
• Nausea and vomiting
• Worsened pain when you move, cough, or sneeze
• Postdrome (following the headache). You may feel exhausted, weak, and confused after a migraine. This can last up to a day.

Migraines are more common in the morning; people often wake up with them. Some people have migraines at predictable times, such as before menstruation or on weekends following a stressful week of work.

To make a diagnosis, your health care provider will:

• Take your medical history
• Ask about your symptoms
• Do a physical and neurological exam

An important part of diagnosing migraines is to rule out other medical conditions which could be causing the symptoms. So you may also have blood tests, an MRI or CT scan, or other tests.

There is no cure for migraines. Treatment focuses on relieving symptoms and preventing additional attacks.

There are different types of medicines to relieve symptoms. They include triptan drugs, ergotamine drugs, and pain relievers. The sooner you take the medicine, the more effective it is.

There are also other things you can do to feel better:

• Resting with your eyes closed in a quiet, darkened room
• Placing a cool cloth or ice pack on your forehead
• Drinking fluids

There are some lifestyle changes you can make to prevent migraines:

• Stress management strategies, such as exercise, relaxation techniques, and biofeedback, may reduce the number and severity of migraines. Biofeedback uses electronic devices to teach you to control certain body functions, such as your heartbeat, blood pressure, and muscle tension.
• Make a log of what seems to trigger your migraines. You can learn what you need to avoid, such as certain foods and medicines. It also help you figure out what you should do, such as establishing a consistent sleep schedule and eating regular meals.
• Hormone therapy may help some women whose migraines seem to be linked to their menstrual cycle
• If you have obesity, losing weight may also be helpful

If you have frequent or severe migraines, you may need to take medicines to prevent further attacks. Talk with your health care provider about which drug would be right for you.

Certain natural treatments, such as riboflavin (vitamin B2) and coenzyme Q10, may help prevent migraines. If your magnesium level is low, you can try taking magnesium. There is also an herb, butterbur, which some people take to prevent migraines. But butterbur may not be safe for long-term use. Always check with your health care provider before taking any supplements.

NIH: National Institute of Neurological Disorders and Stroke

Premenstrual syndrome, or PMS, is a group of physical and emotional symptoms that start one to two weeks before your period. Most women have at least some symptoms of PMS, and the symptoms go away after their periods start. The symptoms may range from mild to severe.

Premenstrual dysphoric disorder (PMDD) is a severe type of PMS. With PMDD, the symptoms are severe enough to interfere with your life. PMDD much less common than PMS.

Researchers don't know exactly what causes PMS. Changes in hormone levels during the menstrual cycle may play a role. These changing hormone levels may affect some women more than others.

PMS symptoms are different for everyone. You may get physical symptoms, emotional symptoms, or both. Your symptoms may also change throughout your life.

Physical symptoms may include:

• Breast swelling and tenderness
• Acne
• Bloating and weight gain
• Headache
• Joint pain
• Backache
• Constipation or diarrhea
• Food cravings

Emotional symptoms may include:

• Irritability
• Mood swings
• Crying spells
• Depression
• Anxiety
• Sleeping too much or too little
• Trouble with concentration and memory
• Less interest in sex

You may wish to see your health care provider if your symptoms bother you or affect your daily life.

There is no single test for PMS. Your provider will talk with you about your symptoms, including when they happen and how much they affect your life. To be diagnosed with PMS, your symptoms must:

• Happen in the five days before your period for at least three menstrual cycles in a row
• End within four days after your period starts
• Keep you from enjoying or doing some of your normal activities

Your provider may wish to do tests to rule out other conditions which may cause similar symptoms.

No single PMS treatment works for everyone. If your symptoms are not severe, you may be able to manage them with:

• Over-the-counter pain relievers such as ibuprofen, aspirin, or naproxen, to help ease cramps, headaches, backaches, and breast tenderness
• Getting regular exercise
• Getting enough sleep
• Eating healthy foods
• Avoiding salt, caffeine, sugar, and alcohol in the two weeks before your period

Some studies have shown that certain vitamins may help with some symptoms of PMS. They include calcium and vitamin B6.

Some women take certain herbal supplements for PMS symptoms. But there is not enough evidence to prove that supplements are effective for PMS. Check with your provider before taking any vitamins or supplements.

If you are not able to manage your PMS symptoms, your provider may suggest prescription medicines. These medicines may also be used to treat PMDD. They include:

• Hormonal birth control, which may help with the physical symptoms of PMS. But sometimes they may make the emotional symptoms worse. You may need to try several different types of birth control before you find the right one.
• Antidepressants, such as selective serotonin reuptake inhibitors (SSRIs), which may help with emotional symptoms.
• Diuretics ("water pills") to reduce symptoms of bloating and breast tenderness.
• Anti-anxiety medicine to ease symptoms of anxiety.

Dept. of Health and Human Services Office on Women's Health

Seasonal affective disorder (SAD) is a type of depression that comes and goes with the seasons. It usually starts in the late fall and early winter and goes away during the spring and summer. Some people do have episodes of depression that start in the spring or summer, but that is a lot less common. Symptoms of SAD may include:

• Sadness
• Gloomy outlook
• Feeling hopeless, worthless, and irritable
• Loss of interest or pleasure in activities you used to enjoy
• Low energy
• Difficulty sleeping or oversleeping
• Carbohydrate cravings and weight gain
• Thoughts of death or suicide

SAD is more common in women, young people, and those who live far from the equator. You are also more likely to have SAD if you or your family members have depression.

The exact causes of SAD are unknown. Researchers have found that people with SAD may have an imbalance of serotonin, a brain chemical that affects your mood. Their bodies also make too much melatonin, a hormone that regulates sleep, and not enough vitamin D.

The main treatment for SAD is light therapy. The idea behind light therapy is to replace the sunshine that you miss during the fall and winter months. You sit in front of a light therapy box every morning to get daily exposure to bright, artificial light. But some people with SAD do not respond to light therapy alone. Antidepressant medicines and talk therapy can reduce SAD symptoms, either alone or combined with light therapy.

NIH: National Institute of Mental Health