QH, qh, or q.h. may refer to:

Airlines

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Medicine

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  • ATCvet code QH Systemic hormonal preparations, excluding sex hormones and insulins, a section of the Anatomical Therapeutic Chemical Classification System for veterinary medicinal products
  • q.h. or qh, Latin for "every hour" (also q2h "every 2 hours", etc.), an abbreviation used in medical prescriptions

Other uses

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  • Qinghai, a province of China (Guobiao abbreviation QH)