A patient with rheumatoid arthritis on methotrexate reports new onset of cough and shortness of breath. The pharmacist's FIRST concern should be:
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A
Methotrexate-induced pneumonitis requiring immediate evaluation
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B
Worsening of underlying rheumatoid arthritis lung involvement only
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C
Common cold unrelated to medication therapy
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D
Need to increase methotrexate dose for better disease control