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This is Dr. Christian. Enalapril and furosemide are very commonly used together. There is a small concern for the kidneys and bloodwork to check them periodically is never a bad idea. However, the benefits for the heart far outweigh the small chance of a problem using them together. Certainly the coughing and hacking is probably caused by her heart problem. If she is having difficult breathing, is weak or her gums or tongue or bluish then I would have her checked immediately. If you have more questions please let me know.
Is there something I should be doing for her tonight?