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A number of treatments are available for seasonal affective disorder (SAD), including cognitive behavioural therapy, antidepressants and light therapy.
Your GP will recommend the most suitable treatment option for you, based on the nature and severity of your symptoms. This may involve using a combination of treatments to get the best results.
The National Institute for Health and Care Excellence (NICE) recommends that SAD should be treated in the same way as other types of depression.
This includes using talking treatments such as cognitive behavioural therapy (CBT) or medication such as antidepressants.
Light therapy is also a popular treatment for SAD, although NICE says it's not clear whether it's effective.
See NICE guidance about the treatment and management of depression in adults.
There are a number of simple things you can try that may help improve your symptoms, including:
It can also be helpful to talk to your family and friends about SAD, so they understand how your mood changes during the winter. This can help them to support you more effectively.
Psychosocial treatments focus on both psychological aspects (how your brain functions) and social aspects (how you interact with others). Some possible psychosocial treatments are described below.
Cognitive behavioural therapy (CBT) is based on the idea that the way we think and behave affects the way we feel. Changing the way you think about situations and what you do about them can help you feel better.
If you have CBT, you'll have a number of sessions with a specially trained therapist, usually over several weeks or months. Your programme could be:
Read more about CBT.
Counselling is another type of talking therapy that involves talking to a trained counsellor about your worries and problems.
During psychodynamic psychotherapy you discuss how you feel about yourself and others and talk about experiences in your past. The aim of the sessions is to find out whether anything in your past is affecting how you feel today.
It's not clear exactly how effective these two therapies are in treating depression.
Read more about psychotherapy.
Antidepressants are often prescribed to treat depression and are also sometimes used to treat severe cases of SAD, although the evidence to suggest they're effective in treating SAD is limited.
Antidepressants are thought to be most effective if taken at the start of winter before symptoms appear, and continued until spring.
Selective serotonin reuptake inhibitors (SSRIs) are the preferred type of antidepressant for treating SAD. They increase the level of the hormone serotonin in your brain, which can help lift your mood.
If you're prescribed antidepressants, you should be aware that:
Common side effects of SSRIs include feeling agitated, shaky or anxious, an upset stomach and diarrhoea or constipation. Check the information leaflet that comes with your medication for a full list of possible side effects.
Read more about antidepressants.
Some people with SAD find that light therapy can help improve their mood considerably. This involves sitting by a special lamp called a light box, usually for around 30 minutes to an hour each morning.
Light boxes come in a variety of designs, including desk lamps and wall-mounted fixtures. They produce a very bright light. The intensity of the light is measured in lux – the higher lux, the brighter the light.
Dawn-stimulating alarm clocks, which gradually light up your bedroom as you wake up, may also be useful for some people.
The light produced by the light box simulates the sunlight that's missing during the darker winter months.
It's thought the light may improve SAD by encouraging your brain to reduce the production of melatonin (a hormone that makes you sleepy) and increase the production of serotonin (a hormone that affects your mood).
Most people can use light therapy safely. The recommended light boxes have filters that remove harmful ultraviolent (UV) rays, so there's no risk of skin or eye damage for most people.
However, exposure to very bright light may not be suitable if you:
Speak to your GP if you're unsure about the suitability of a particular product.
Light boxes aren't usually available on the NHS, so you'll need to buy one yourself if you want to try light therapy.
Before using a light box, you should check the manufacturer's information and instructions regarding:
Make sure that you choose a light box that is medically approved for the treatment of SAD and produced by a fully certified manufacturer. The Seasonal Affective Disorder Association can provide you with a list of recommended manufacturers.
There's mixed evidence regarding the overall effectiveness of light therapy, but some studies have concluded it is effective, particularly if used first thing in the morning.
It's thought that light therapy is best for producing short-term results. This means it may help relieve your symptoms when they occur, but you might still be affected by SAD next winter.
When light therapy has been found to help, most people noticed an improvement in their symptoms within a week or so.
It's rare for people using light therapy to have side effects. However, some people may experience:
These side effects are usually mild and short-lived, but you should visit your GP if you experience any particularly troublesome side effects while using light therapy.