Find a comprehensive guide to possible side effects including common and rare side effects when taking Macrobid (Nitrofurantoin) for healthcare professionals and. Macrobid (nitrofurantoin) is an antibiotic used to treat urinary tract infections. Includes side effects, interactions and indications. Common Side Effects of Macrobid. Diarrhea, gas, nausea, and headache are common side effects. These usually do not need medical attention. Doxycycline side effects may include vomiting, diarrhea, nausea, and loss of appetite. This eMedTV Web page lists other possible side effects, including more serious. Medscape Infectionspecific dosing for Macrobid, Macrodantin (nitrofurantoin), frequencybased adverse effects, comprehensive interactions, contraindications. Consult your pharmacist or doctor if these instructions are not clear. The usual doses are: For treatment of bladder infections: One capsule twice a day for seven. Learn about Macrobid (Nitrofurantoin) may treat, uses, dosage, side effects, drug interactions, warnings, patient labeling, reviews, and related medications. Macrobid (Nitrofurantoin) is an antibiotic used to treat bladder infections (acute cystitis). It works by stopping the growth of bacteria. Macrobid official prescribing information for healthcare professionals. Includes: indications, dosage, adverse reactions, pharmacology and more. Potential side effects seen with metronidazole include diarrhea or constipation, dizziness, and nausea. This eMedTV Web page includes a more complete list of possible. Find patient medical information for Macrobid Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings..