Midodrine

Avoid concomitant drugs that increase BP (eg, phenylephrine, pseudoephedrine, ephedrine, dihydroergotamine, thyroid hormones, droxidopa); if unavoidable, monitor BP closely. Avoid concomitant MAO inhibitors or linezolid. Potentiated by sodium-retaining steroids (eg, fludrocortisone acetate); caution in increased intraocular pressure with fludrocortisone. Antagonized by α-antagonists (eg, prazosin, terazosin, doxazosin). Levels may be affected by renally-excreted alkaline drugs (eg, metformin, cimetidine, ranitidine, procainamide, triamterene, flecainide, quinidine). Cardiac glycosides, β-blockers, CNS drugs may cause bradycardia, AV block, arrhythmias; discontinue if bradycardia occurs.