A recent NIOSH evaluation of a pharmaceutical manufacturing facility found that respirable dust levels could be very high for short periods during some activities and that hand-scooping powder during tablet pressing generated the highest measured dust levels, even though full-shift dust levels were below occupational exposure limits.
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page 6 · Our Key Findings · 1During some work activities, respirable dust levels ... could be very high for short periods of time. During tablet pressing, hand-scooping powder generated the highest dust levels compared with other tasks we measured.
The same NIOSH evaluation recommends reducing airborne pharmaceutical dust because active pharmaceutical ingredients can cause allergic reactions and upper-respiratory irritation, and recommends closed powder handling and HEPA-filtered vacuuming rather than compressed-air cleaning.
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page 7 · Recommendation 1: Reduce airborne dust exposure as much as possible · 1Exposure to this dust can cause health problems like allergic reactions and upper respiratory irritation. ... Use a vacuum equipped with a high efficiency particulate air or HEPA filter to clean dust on surfaces. Reduce or stop hand scooping powders.