@fef @poppawheelz @markl33 @jsiegel and others in this discussion, I don't want to sound like a broken record, but...
Every person is different.
Every body reacts differently to medication.
Every person has a different list of other medications that may interact.
Every person has a different list of other health issues or comorbidities.
Every medication, even OTC meds and some supplements have potential side effects.

So...please remember to say:
"I reacted this way to the medication, so you might want to be careful..." or
"Side effects include [nausea or ?] so be aware if it happens to you" or
"The prescription insert has the,following warning"
Dire warnings are scary...please avoid.

Many people, myself included, find duloxetine to be a blessing in managing our fibromyalgia or chronic pain. Others do not have such a positive experience.