What Are Side Effects (Adverse Effects)? What Causes Side Effects?

What Are Side Effects (Adverse Effects)? What Causes Side Effects?
A side effect, also known as an adverse effect, adverse event, or undesirable secondary effect is when a treatment goes beyond the desired effect and causes a problem; the treatment, which may be a medication, surgical procedure or some kind of therapy has an undesirable secondary effect which occurs in addition to the desired therapeutic effect. Experts say that side effects vary for each …

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