The bilateral pedal edema in this patient is most likely related to low serum
albumin (2.35 g/dL).
Additional contributing factors may include the patient’s chronic illness (interstitial lung disease) and long-term steroid therapy, which can affect protein metabolism and nutritional status. Diltiazem may also contribute to peripheral edema in some patients.
Next Steps
Consult a General Physician / Internal Medicine specialist for initial evaluation. Depending on the clinical findings, referral to a Pulmonologist (given the history of ILD) or Cardiologist may be advised to rule out pulmonary hypertension or cardiac causes of edema.
Possible management approach (to be decided by the treating physician):
Evaluation for the cause of low
albumin (nutritional status, protein loss, chronic inflammation).
Dietary protein optimization if nutritional deficiency is suspected.
Review of current medications, including diltiazem, if drug-related edema is suspected.
Diuretics may be prescribed if clinically indicated for symptomatic edema.
Assessment of cardiac function (e.g., echocardiography) if heart-related causes are suspected.