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BACKGROUND Many consumers use natural health products (NHPs) concurrently with prescription medications. As NHP-related harms are under-reported through passive surveillance, the safety of concurrent NHP-drug use remains unknown. To conduct active surveillance in participating community pharmacies to identify adverse events related to concurrent(More)
OBJECTIVES To investigate the rates and causality of adverse event(s) (AE) associated with natural health product (NHP) use, prescription drug use and concurrent NHP-drug use through active surveillance in community pharmacies. DESIGN Cross-sectional study of screened patients. SETTING 10 community pharmacies across Alberta and British Columbia, Canada(More)
PURPOSE Natural health products (NHPs), including melatonin, are widely used products. Despite the widespread assumption that all NHPs are safe, they contain pharmacologically active substances and can therefore have adverse effects and/or interact with pharmaceuticals. OBJECTIVE To investigate the mechanism underlying NHP interactions identified through(More)
In this paper, novel recursive algorithms for realization of one-dimensional discrete sine transform (DST) and inverse discrete sine transform (IDST) of any length are proposed. By using some mathematical techniques, recursive expressions for DST and IDST have been developed. Then, the DST and IDST are implemented by recursive filter structures. A linear(More)
In this paper radix-2 algorithms for computation of type-II discrete cosine transform (DCT) and discrete sine transform (DST) of length N = í µí¿ í µí² (í µí² ≥ í µí¿) are presented. The DCT/DST can be computed from two DCT/DST sequences, each of length N/2. The odd-indexed output components of DCT/DST can be realized using simple recursive relations.(More)
Discrete Hartley transform is an important tool in digital signal processing. This paper presents a novel recursive algorithm for realization of one-dimensional discrete Hartley transform of even length. The transform is constructed by single folding of input data and using Chebyshev Polynomial. Single folding algorithm provides data throughput two times of(More)
Purpose To investigate the adverse event (AE) rates associated with natural health product (NHP) use, prescription drug use and concurrent NHPs-drug use through active surveillance in community pharmacies in Alberta and British Columbia, Canada. Methods Participating pharmacists and pharmacy technicians screened consecutive individuals picking up(More)