The information provided here is meant to give you a general idea about each of the medications listed below. Only the most general side effects are included, so ask your doctor if you need to take any special precautions. Use each of these medications as recommended by your doctor, or according to the instructions provided. If you have further questions about usage or side effects, contact your doctor.
There are several types of antidepressant drugs that can be used to treat depressive disorders. You may have success with the first medication prescribed, or you may need to try other antidepressants before finding the right one or ones for you. Sometimes the dosage must be increased to be effective. Although some improvements may be seen in the first few weeks, antidepressant medications must be taken regularly for 3-4 weeks (in some cases, as many as eight weeks) before the full therapeutic effect occurs.
Do not stop taking your medication without talking to our doctor. Even if you feel better and think you no longer need the medication, or you may think the medication isn’t helping, do not stop before you speak with your doctor. You need to continue taking the medication until it has a chance to work. Call your doctor if you experience side effects from the medication.
Once you are feeling better, keep taking your medication for as long as your doctor recommends (usually at least six months) to prevent a recurrence of depression. Some medications must be slowly tapered to give your body time to adjust. If stopped abruptly, some drugs may cause withdrawal symptoms. If you have chronic or recurrent depression, you may need to take medication indefinitely.
The FDA advises that people taking antidepressants should be closely observed. For some, the medications have been linked to worsening symptoms and suicidal thoughts. These adverse effects are most common in young adults. The effects tend to occur at the beginning of treatment or when there is an increase or decrease in the dose.
Although the warning is for all antidepressants, of most concern are the SSRI class such as:
Selective serotonin reuptake inhibitors (SSRIs) affect the concentration in the brain of the neurotransmitter serotonin, which plays a role in depression. The SSRIs are often a preferred class of antidepressants because they are thought to be easier to use, tend to produce fewer side effects, are as effective, and are less likely to be fatal in an overdose compared to other medications available. SSRIs are not addictive.
Improvement is usually seen in 4-6 weeks after beginning treatment. You should not drink alcohol while taking this medication. Do not take an SSRI if you have taken a
monoamine oxidase inhibitor (MAOI)
in recent weeks.
Tricyclic antidepressants are thought to regulate serotonin and norepinephrine in the brain. They have been used effectively for the treatment of depression. Improvement is usually seen in 3-6 weeks after beginning treatment. These drugs are highly toxic if taken in large doses; therefore, they are often not prescribed for suicidal patients. Tricyclic antidepressants are not addictive.
Monoamine oxidase inhibitors (MAOIs) are a type of antidepressant that prevent the breakdown of serotonin and norepinephrine. They have been shown to be effective in treating depression. This medication is especially effective for people whose symptoms have not responded to other treatments. Improvement is usually seen in 2-6 weeks after beginning treatment. MAOIs are not widely used today because of dietary restrictions and unpleasant side effects. Ensam (selegiline patch), the lowest dose, is an exception to this.
MAOIs can cause severe adverse reactions when combined with many other types of drugs, including other types of antidepressants. Ask your doctor and pharmacist for complete directions about what drugs to avoid. When taking MAOIs, there are foods you should avoid, as well. These are foods with a high tyramine content, such as:
Pickled, marinated, smoked, cured, or fermented foods
Nuts and peanut butter
Excess amounts of caffeine
Foods containing monosodium glutamate
The above dietary restrictions do not apply to the 6 mg dose. Ask your doctor, pharmacist, or nutritionist for a complete list of foods you should avoid.
Possible side effects include:
Changes in blood pressure, including hypertensive crisis
SNRIs affect the level of two neurotransmitters in the brain, serotonin and norepinephrine. Some studies suggest that these drugs are more effective than SSRIs, but these results have been questioned. Improvement is usually seen about 3-6 weeks after starting treatment.
Atypical antidepressants affect the concentration of the neurotransmitter serotonin and can be effective in treating depression. Improvement is usually seen in 4-6 weeks after beginning treatment.
Nefazodone (Serzone) has been associated with reports of life-threatening liver failure. People with pre-existing liver disease should not take it. Patients who are taking nefazodone are advised to immediately report symptoms of liver toxicity, such as
, loss of appetite, malaise, and gastrointestinal symptoms, to their doctor.
Depending on the drug, possible side effects include:
Increase risk of seizures (when taking bupropion)
Whenever you are taking a prescription medication, take the following precautions:
Take your medication as directed. Do not change the amount or the schedule.
Do not stop taking them without talking to your doctor.
Do not share them.
Know what the results and side effects. Report them to your doctor.
Some drugs can be dangerous when mixed. Talk to a doctor or pharmacist if you are taking more than one drug. This includes over-the-counter medication and herb or dietary supplements.
Plan ahead for refills so you don’t run out.
When to Contact Your Doctor
Contact your doctor if you have any questions about your medication, any side effects that are troublesome, or if you feel that the medication is not working after the allotted time period.
FDA approves Ensam (selegiline) as first drug patch for depression. Lowest dose can be used without restrictions required of MAOI class of depression drugs. FDA News. Federal Drug Administration website. Available at:
. Accessed March 31, 2007.
Fochtmann LJ, Gelenberg AJ.
Guideline Watch: Practice Guideline for the Treatment of Patients with Major Depressive Disorder.
2nd ed. Arlington, VA: American Psychiatric Association; 2005. American Psychiatric Association website. Available at:
. Accessed March 25, 2007.
Pies R, Rogers D. The recognition and treatment of depression: A review for the primary care clinician. Medscape website. Available at:
. Accessed October 11, 2005.
Please be aware that this information is provided to supplement the care
provided by your physician. It is neither intended nor implied to be a
substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER
IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the
advice of your physician or other qualified health provider prior to
starting any new treatment or with any questions you may have regarding a