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Powder containment hood, pharmaceutical analytical scale, mortar and pestle, graduated cylinder
Weigh out powder and add to a mortar.
Triturate contents to a fine powder.
Levigate powder with a small amount of vehicle to form a paste.
Add vehicle in increasing amounts while mixing thoroughly.
Transfer contents of the mortar to a graduated cylinder.
Rinse the mortar and pestle with vehicle and pour into graduated cylinder.
Add vehicle to the graduated cylinder to achieve the total volume indicated above.
Transfer contents of the graduated cylinder into an appropriately sized amber bottle.
Shake well to mix.
Alternatives — May substitute vehicle with Oral Mix SF.
Quality-Control Procedures — Visually inspect for physical appearance of formulation and container closure integrity (no leakage, cracks in container, or improper seals).
Labeling Requirements — Extemporaneously compounded preparation. For oral use only. Store at room temperature. Shake well before use.
Storage Conditions/Stability — Store at room temperature. Stable for 90 days. Note: Because precipitation was observed at 5°C for all vehicles, these preparations should NOT be refrigerated.1
Study Container Type — Amber polyethylene terephthalate (PET) bottle with black phenolic cap and 1-mL amber oral syringe
Referenced Manufacturer — Gabapentin powder, Oral Mix, Oral Mix SF (Medisca).
Stability-Indicating Study — Yes
Commercially available as a 50-mg/mL solution — Use extemporaneously prepared formulation only when commercial product is unavailable or a more concentrated suspension is desired.
Friciu M, Roullin VG, Leclair G. Stability of gabapentin in extemporaneously compounded oral suspensions. PLoS One. 2017;12(4):e0175208. doi: 10.1371/pone.0175208.
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