Adults
Drug-induced rheumatic disease
Drug-induced lupus, statin myopathy, retinoid sacroiliitis, or vasculitis linked to a medication.
What to look for
- Drug-induced lupus: hydralazine, procainamide, minocycline, isoniazid, TNF inhibitors (anti-histone antibodies common)
- Statin myopathy, including anti-HMGCR necrotizing myopathy
- ANCA vasculitis linked to hydralazine, propylthiouracil, levamisole-adulterated cocaine
- Arthralgia or arthritis from aromatase inhibitors, retinoids, or fluoroquinolones (tendinopathy)
What to do
- Stop or switch the likely drug when possible. Most cases improve over weeks to months.
- Send ANA, anti-histone, anti-dsDNA, CK and ANCA as relevant to the presentation.
- Refer if symptoms persist more than about a month after stopping, if there is organ involvement, or if it is unclear whether the disease is drug-induced.
About this urgency level
Specialist evaluation helps, but these are usually less time-sensitive than new inflammatory arthritis or connective tissue disease.
Timeframes are typical targets. Local pathways, capacity and clinical judgment come first.