Please select the eligibility criteria that correspond to the clinical trial below.
Title: Flexible Dosed Duloxetine Versus Placebo in the Treatment of Fibromyalgia
Brief Summary: The purpose of this study is to confirm the efficacy and safety of duloxetine 60-120 mg once daily in comparison to placebo on symptom improvement in patients meeting criteria for fibromyalgia aged 18 and older. Patients will be randomized to duloxetine or placebo, however, all patients will receive duloxetine at some point in the study.


Options:
A: Inclusion Criteria:

* male or female patients
* aged 18 and older who meet criteria for fibromyalgia as defined by the American College of Rheumatology
* have a score of at least 4 on the average pain item of the Brief Pain Inventory (BPI) (modified short form) at visits 1 and 2
* all females must test negative for pregnancy at the time of enrollment
* have a degree of understanding such that the patient can provide informed consent, complete protocol required assessments and communicate intelligibly with the investigator and study coordinator.

Exclusion Criteria:

* have pain symptoms related to traumatic injury, structural rheumatic disease, or regional rheumatic disease that will interfere with interpretation of outcome measures
* have regional pain syndrome, multiple surgeries or failed back syndrome
* have confirmed current or previous diagnosis of rheumatoid arthritis, inflammatory arthritis, or infectious arthritis, or an autoimmune disease (i.e. systemic lupus erythematosus)
B: Inclusion Criteria:

* Major Depressive Disorder according to DSM-IV criteria with at least one previous depressive episode in the patient's medical history
* Painful physical symptoms as measured by the Brief Pain Inventory-Short Form

Exclusion Criteria:

* Any anxiety disorder as a primary diagnosis within the past 6 months (including panic disorder, OCD, PTSD, generalized anxiety disorder and social phobia)
* Any diagnosis of bipolar disorder, schizophrenia, or other psychotic disorders
C: Inclusion Criteria:

* Pain due to bilateral peripheral neuropathy (caused by type 1 or type 2 diabetes mellitus. Pain must begin in the feet, with relatively symmetrical onset. Daily pain should be present for more than 3 months \[assessed by questioning patient\]).
* Score of at least 4 on the 24-hour average pain severity score on an 11-point Likert scale \[on Brief Pain Inventory (BPI) Modified Short Form\] at screening and at randomization.
* Patient is currently not receiving treatment for diabetic peripheral neuropathic pain (DPNP) or was receiving treatment for DPNP, with a drug other than pregabalin or duloxetine, and completed the required washout
* Patient has never received treatment with duloxetine or pregabalin. (However, a short course of less than 15 days of treatment, at any time previously, will be allowed.)
* Stable glycemic control, as assessed by a physician investigator, and hemoglobin A1c (HbA1c) less than or equal to 12% at screening.

Exclusion Criteria:

* Have a known hypersensitivity to duloxetine or pregabalin or any of the inactive ingredients or have any contraindication for the use of duloxetine or pregabalin.
* Have uncontrolled narrow-angle glaucoma.
* Have received treatment with a monoamine oxidase inhibitor (MAOI) within 14 days prior to randomization, or have a potential need to use a MAOI during the study or within 5 days after discontinuation of study drug.
* Have received fluoxetine within 30 days prior to randomization.
* Have acute liver injury (such as hepatitis) or severe cirrhosis (Child-Pugh Class C).
* Have a serum creatinine greater than or equal to 1.5 milligram per deciliter (mg/dL) or a creatinine clearance less than 60 milliliter per minute (mL/min), at screening.
* Are judged clinically by the investigator to be at suicidal risk or as defined by a score of 2 or greater on Question 9 of the Beck Depression Inventory-II (BDI-II), at screening or randomization
* Have a historical exposure to drugs known to cause neuropathy (for example, vincristine), or a history of a medical condition, including pernicious anemia and hypothyroidism, that could have been responsible for neuropathy.
* Have pain that cannot be clearly differentiated from or conditions that interfere with the assessment of the DPNP.
* Have serious or unstable cardiovascular, hepatic, renal, respiratory or hematological illness; symptomatic peripheral vascular disease; a history of seizure disorder; or other medical (including unstable hypertension and not clinically euthyroid) or psychological conditions that, in the opinion of the investigator, would compromise participation or be likely to require hospitalization during the course of the study.
* Have received non-pharmacological treatment for pain within 14 days prior to randomization, or do not agree to abstain from non-pharmacological treatment during the study.
* Have a history of frequent and/or severe allergic reactions with multiple medications.
D: Inclusion Criteria:

* Meet criteria for primary Fibromyalgia Syndrome as defined by the American College of Rheumatology

Exclusion Criteria:

* Have any current primary Axis I diagnosis other than major depressive disorder
* Have any current or previous diagnosis of psychosis, bipolar disorder, or schizoaffective disorder
* Have any primary diagnosis of anxiety disorder within the past year (including panic disorder, agoraphobia, OCD, PTSD, GAD and social phobia)
* Have regional pain syndrome, multiple surgeries or failed back syndrome
* Have a confirmed current or previous diagnosis of rheumatoid arthritis, inflammatory arthritis, or infective arthritis, or an autoimmune disease (e.g. lupus)

Answer: A