Application of terahertz Time-Domain spectroscopy and chemometrics-based whale optimization algorithm in PDE5 inhibitor detection

Combating the illicit use of PDE5 inhibitor drugs is a focal point in forensic science research. In order to achieve rapid identification of such drugs, this study applies terahertz time-domain spectroscopy combined with chemometrics to establish a fast and accurate detection method for PDE5 inhibitors. The optimal detection method is determined by comparing the spectral performance of three optical parameters, namely absorption coefficient, refractive index, and dielectric constant. Linear discriminant models based on different spectral parameters, whale optimization algorithm optimized extreme learning machine models, and whale optimization algorithm optimized random forest models are established. The effectiveness and performance of principal component analysis and competitive adaptive reweighted sampling algorithm for spectral feature data selection are also investigated. The PDE5 inhibitor identification model based on the competitive adaptive reweighted sampling - whale optimization algorithm - random forest (CARS-WOA-RF) model achieves an accuracy of 98.61%, and the identification model for two concentrations of Sildenafil achieves 100% accuracy. The results demonstrate that terahertz time-domain spectroscopy combined with chemometrics can effectively detect various common types of PDE5 inhibitor drugs and different concentrations.

Amphetamine-type Stimulants: Novel Insights into their Actions and use Patterns

This review focuses on the effects and mechanisms of action of amphetamine-type stimulants (ATS) and their adverse effects on the cardiovascular, nervous, and immune systems. ATS include amphetamine (AMPH), methamphetamine (METH, "crystalmeth," or "ice"), methylenedioxymethamphetamine (MDMA, "ecstasy," or "Molly"), MDMA derivatives (e.g., methylenedioxyamphetamine [MDA] and methylenedioxy-N-ethylamphetamine [MDEA]), khat, and synthetic cathinones. The first section of this paper presents an overview of the historical aspects of ATS use, their initial clinical use, and regulations. The second part reviews the acute and chronic impact and the most salient clinical effects of ATS on the central nervous and cardiovascular systems, skin, and mouth. The chemical structure, pharmacokinetics, and classic and non-canonical pharmacological actions are covered in the third section, briefly explaining the mechanisms involved. In addition, the interactions of ATS with the central and peripheral immune systems are reviewed. The last section presents data about the syndemic of ATS and opioid use in the North American region, focusing on the increasing adulteration of METH with fentanyl.

Pharmacists' perceptions and attitudes toward drug importation into the State of Florida

BACKGROUND

The Department of Health and Human Services and the Food and Drug Administration released the Safe Importation Action Plan in July 2020 detailing methods to import medicines from Canada to combat increasing drug costs. In November 2020, Florida became the first state in the United States to create and propose an importation plan from Canada. This study examines the proposal submitted by Florida, Florida pharmacists' perceptions of the program on patient safety, and Florida pharmacists' thoughts on the pharmacy operational impact.

METHODS

This was a cross-sectional study utilizing an electronic questionnaire sent to pharmacist members of the Florida Pharmacy Association. The survey incorporated closed-ended and open-ended questions. The results from the study were reported and analyzed through descriptive statistics, qualitative and quantitative data.

RESULTS

Two-hundred and forty-four pharmacists responded to the survey. Of those respondents, 25% stated they had no knowledge about Florida's drug importation plan. Less than 12% of respondents stated they would trust the safety and quality of imported medicines. Seventy percent of pharmacists expressed concerns regarding the changes required in pharmacy operations to increase medicine safety. About half of the respondents questioned whether this plan would promote cost-savings as intended.

CONCLUSION

Florida pharmacists believe the drug importation plan does not address all aspects of patient and medicine safety and expressed concerns regarding logistical operations of a pharmacy. This article highlights those concerns and acts as a summons to action.