Nitrofurantoin (Macrobid) Capsule Administration
Macrobid is formulated as a hard gelatin capsule that contains a powder blend of nitrofurantoin plus macrocrystalline nitrofurantoin. [1] The powder blend forms a gel matrix in gastrointestinal fluids that releases nitrofurantoin over time. [1] Because of this formulation-dependent release behavior, crushing Macrobid is not recommended. [1]
Formulation Properties Relevant to Crushing
Macrobid capsules are hard gelatin capsules. [1] Macrobid contains two nitrofurantoin components: macrocrystalline nitrofurantoin and nitrofurantoin monohydrate. [1] The nitrofurantoin monohydrate component is described as forming a gel matrix that releases nitrofurantoin over time after exposure to gastric and intestinal fluids. [1]
Practical Medication-Administration Guidance
Macrobid should be taken as a capsule by mouth with food as directed on the product labeling. [2] Crushing the capsule is likely to alter how the nitrofurantoin is exposed to gastrointestinal fluids and therefore may change drug release. [1]
When Alternatives May Be Required
If swallowing tablets or capsules is not possible, an alternative nitrofurantoin product or an alternative antibiotic strategy should be selected by the prescribing clinician or pharmacist rather than crushing Macrobid. [1]
Source-Based Safety Note
Macrobid’s labeled formulation and release mechanism are designed for oral capsule administration. [1]