4 doctors weighed in:

How can steroids cause myositis but also treat myositis? And can it cause muscle aches after two days of 10 mg predinsone? My legs are really hurting.

4 doctors weighed in
Dr. Ralph Morgan Lewis
Family Medicine
3 doctors agree

In brief: Steroid effects

Steroids treat myositis with their anti-inflammatory effect.
They can cause muscle pain due to their effect on electrolytes—sodium, potassium, magnesium. The leg pain may be due to electrolyte imbalance. See prescribing doc; you may need temporary potassium &/or magnesium supplement to calm leg muscles.

In brief: Steroid effects

Steroids treat myositis with their anti-inflammatory effect.
They can cause muscle pain due to their effect on electrolytes—sodium, potassium, magnesium. The leg pain may be due to electrolyte imbalance. See prescribing doc; you may need temporary potassium &/or magnesium supplement to calm leg muscles.
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