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Antidepressant Medication Antidepressant medication There is a lot of misinformation about antidepressant medication and there is no simple explanation as to how it works. Medication can be important in the treatment of moderate to severe depression and in some anxiety conditions. This fact sheet looks at what antidepressants do, how they work and where to get more information and help. How do antidepressants work? People with more severe forms of depression (bipolar disorder and depression with psychosis) Research shows that more severe forms do generally need to be treated with medication. of depression are associated with specific This may include one or a combination changes in the brain, including changes to of mood stabilisers, anti-psychotic drugs some hormones and chemical message and antidepressants. systems. In these forms of depression, there are alterations in the activity of the brain in areas Which antidepressants are the which may cause a major depressive episode. This is associated with the symptoms and most useful? disability seen with depression. Antidepressant Making a decision about which antidepressant medication is thought to influence the activity is best for a person can be complex. The decision of serotonin and noradrenaline in some areas of is made in consultation with a doctor, after careful the brain. However, depression is not simply a assessment and consideration. People can help deficiency of these chemicals. Different types of the doctor’s assessment by providing as much antidepressants work in slightly different ways, information as possible about themselves and but they all have an influence on parts of the their medical history. Important factors include brain related to emotions and motivation. the person’s age, symptoms, other medications and, if female, whether they are pregnant When is antidepressant or breastfeeding. medication used? There are many different types of antidepressant Antidepressant medication may be prescribed, medication which have been shown to work, but along with psychological treatments, when a their effectiveness differs from person to person. person experiences a moderate to severe episode Your doctor may wish to prescribe a particular of depression. Sometimes, antidepressants are antidepressant to tailor it to your particular prescribed when other treatments have not been symptoms. Antidepressants take at least two successful or when psychological treatments are weeks before they start to help, and it may also not possible due to the severity of the illness or a take some time for the doctor to find the most lack of access to the treatment. suitable medication and dosage. beyondblue.org.au 1300 22 4636 1 of 4 Age Antidepressant medication is generally not recommended for use by itself in people with Depression is common and can affect people bipolar disorder as it can trigger mania. of all ages, however, generally medication is not recommended as the first choice for the treatment of depression in children and “I resisted medication for years; young people. inaccurately believing it was ‘weak’ or I would turn into a ‘vegetable’. The Therapeutic Goods Administration (Australia’s regulatory agency for medical drugs) Many misconceptions exist regarding and manufacturers of antidepressants do not medication. In my case, medication recommend antidepressant use for depression propelled my recovery and helped me in young people under the age of 18. There are, to utilise psychological treatments however, no government (i.e. Pharmaceutical effectively.” Benefits Scheme) restrictions placed on the prescription of antidepressants and doctors are April, 25 not prevented from prescribing them if they feel they are needed. There is concern that a small percentage of Types of antidepressants young people up to the age of 24 years taking There are many different types of antidepressant Selective Serotonin Reuptake Inhibitors (SSRIs) medication. Your doctor may need to find the for the treatment of depression may experience medication and dose which is most effective an increase in suicidal thoughts and behaviour. for you. Keep in mind antidepressants take time Research shows the risk to be roughly 4 per before they start to help (at least two weeks). cent compared to 2 per cent for those taking a Below is a description of the different classes placebo dummy pill). of antidepressants. Please note, this list only A young person will require close medical includes the generic medication names and not supervision and monitoring in the early stages the pharmaceutical brand names. Please look on of treatment if an antidepressant is prescribed. your medication packaging to find the name of the medication you are taking (this is usually Chronic illness written in lowercase). Like any medication, antidepressants can There are differences in effects and side-effects produce side-effects. In some cases, taking of the antidepressants listed below, which antidepressants can affect existing symptoms can be discussed with your prescribing health or treatments for other illnesses. It is important professional. for people to let doctors know about any illness they may have and any medication they Selective Serotonin Reuptake Inhibitors are taking. (SSRIs) This class includes sertraline; citalopram; Pregnancy and breastfeeding escitalopram; paroxetine; fluoxetine; fluvoxamine. The decision to take medication while pregnant SSRIs are: or breastfeeding is an individual one. It should • the most commonly prescribed be made in consultation with a doctor after antidepressants in Australia considering the risks and benefits to both the mother and baby. The lowest effective dose • often a doctors’ first choice for most types of should be used. depression If a woman is breastfeeding, generally specific • generally well tolerated by most people types of medications are preferred. While a • generally non-sedating. number of factors will influence the choice of antidepressant, a group of antidepressants Serotonin and Noradrenalin Reuptake called tricyclics, as well as sertraline, citalopram Inhibitors (SNRIs) and fluvoxamine are most commonly prescribed for women who are breastfeeding. This class includes venlafaxine; desvenlafaxine; duloxetine. SNRIs: Studies show that paroxetine is generally not recommended at this time.1,2 • have fewer side-effects compared to the older antidepressants (such as TriCyclic Antidepressants and bipolar disorder Antidepressants) People who have bipolar disorder and experience • are often prescribed for severe depression an episode of depression will often be given a • are safer if a person overdoses. mood stabiliser alone. It can take time for mood stabilisers to work. Sometimes antidepressants are used along with mood stabilisers to help ease the symptoms. beyondblue.org.au 1300 22 4636 2 of 4 Reversible Inhibitors of MonoAmine oxidase (RIMAs) Things to note The class includes moclobemide. RIMAs: • All of these drugs have been shown to have effect as antidepressants for • have fewer side-effects more severe depression however • are non-sedating their effectiveness differs from person to person. • may be less effective in treating more severe forms of depression than other antidepressants • When symptoms are directly due to depression, the person is likely to begin • are helpful for people who are experiencing to improve after 4-6 weeks of effective anxiety or sleeping difficulties. therapy. For example, although SSRIs commonly make sleep difficulties TriCyclic Antidepressants (TCAs) or insomnia worse initially, they are The class includes nortriptyline; clomipramine; associated with improved sleep 4-6 dothiepin; imipramine; amitriptyline. TCAs are: weeks later. • effective, but have more harmful side-effects • TCAs are commonly prescribed for their than newer drugs (i.e. SSRIs) wide range of general benefits, but are also the most toxic antidepressants if • more likely to cause low blood pressure – so taken in large quantities. this should be monitored by a doctor • SSRIs or clomipramie (TCA) would be • more risky if a person were to overdose. the first choice if obsessive compulsive disorder symptoms were prominent. Noradrenaline-Serotonin Specific Antidepressants (NaSSAs) This class includes mirtazapine. NaSSAs are: • helpful when there are problems with anxiety, sleeping or poor appetite Monoamine Oxidase Inhibitors (MAOIs) • generally low in sexual side-effects, but may This class includes tranylcypromine. MAOIs are cause weight gain. prescribed only under exceptional circumstances as they require a special diet and have adverse effects. Noradrenalin Reuptake Inhibitors (NARIs) Tetracyclics This class includes reboxetine. NARIs are: This class includes Mianserin. Tetracyclics: • designed to act selectively on one type of brain chemical – noradrenalin • operate via noradrenaline and serotonin neurotransmitters systems • less likely to cause sleepiness or drowsiness than some other antidepressants • include side-effects such as sedation and dizziness • more likely to: • can cause a rare side-effect to arise, so • make it difficult for people to sleep occasional blood tests are necessary. • cause increased sweating after the initial doses What are the side effects? • cause sexual difficulties after the initial doses Antidepressants can make people feel better, but they won’t change their personality or • cause difficulty urinating after the initial doses make them feel happy all the time. They will • cause increased heart rate after the not improve unhappiness due to a predicament initial doses.
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