Academic performance and use of psychoactive drugs among healthcare students at a university in southern Brazil: cross-sectional study.

People have been using psychoactive substances for a long time. Over the last few years, this practice has spread among university students, who use these substances to improve their academic performance, relieve stress and increase concentration and memory.

To estimate the use of psychoactive drugs among healthcare students at a higher education institution in the city of Passo Fundo (RS), Brazil, and to ascertain the associated demographic and lifestyle factors.Cross-sectional study in a higher education institution.We included 287 undergraduate medicine and dentistry students in this study.

They answered a self-administered questionnaire regarding sociodemographic, lifestyle and health variables. The statistical analysis used univariate and bivariate analyses with Pearson’s chi-square test (P-value < 0.05). -Multivariate analyses were used to estimate odds ratios (OR) and their respective 95% confidence intervals. The SPSS software, version 20.0, was used.The prevalence of use of psychoactive substances among the students was 24.7%.

Among these students, high frequencies of psychoactive drugs had been prescribed by physicians (95.8%) and for the purpose of relaxation or stress relief (73.2%). Women, medicalstudents (compared with dental students) and participants with lower academic performance were more likely to use psychoactive drugs. After the multivariate adjustment, the “course” and “academic performance” remained associated with use of psychoactive drugs.

Canine Von Willebrand Factor (vWF) ELISA Kit
DLR-vWF-c-96T	DL Develop	96T	EUR 688
Should the Canine Von Willebrand Factor (vWF) ELISA Kit is proven to show malperformance, you will receive a refund or a free replacement.
Description: A sandwich quantitative ELISA assay kit for detection of Canine Von Willebrand Factor (vWF) in samples from plasma.

Human Von Willebrand Factor (vWF) ELISA Kit
DLR-vWF-Hu-48T	DL Develop	48T	EUR 479
Should the Human Von Willebrand Factor (vWF) ELISA Kit is proven to show malperformance, you will receive a refund or a free replacement.
Description: A sandwich quantitative ELISA assay kit for detection of Human Von Willebrand Factor (vWF) in samples from plasma or other biological fluids.

Human Von Willebrand Factor (vWF) ELISA Kit
DLR-vWF-Hu-96T	DL Develop	96T	EUR 621
Should the Human Von Willebrand Factor (vWF) ELISA Kit is proven to show malperformance, you will receive a refund or a free replacement.
Description: A sandwich quantitative ELISA assay kit for detection of Human Von Willebrand Factor (vWF) in samples from plasma or other biological fluids.

Mouse Von Willebrand Factor (vWF) ELISA Kit
DLR-vWF-Mu-48T	DL Develop	48T	EUR 489
Should the Mouse Von Willebrand Factor (vWF) ELISA Kit is proven to show malperformance, you will receive a refund or a free replacement.
Description: A competitive inhibition quantitative ELISA assay kit for detection of Mouse Von Willebrand Factor (vWF) in samples from plasma.

Mouse Von Willebrand Factor (vWF) ELISA Kit
DLR-vWF-Mu-96T	DL Develop	96T	EUR 635
Should the Mouse Von Willebrand Factor (vWF) ELISA Kit is proven to show malperformance, you will receive a refund or a free replacement.
Description: A competitive inhibition quantitative ELISA assay kit for detection of Mouse Von Willebrand Factor (vWF) in samples from plasma.

Porcine Von Willebrand Factor (vWF) ELISA Kit
DLR-vWF-p-48T	DL Develop	48T	EUR 547
Should the Porcine Von Willebrand Factor (vWF) ELISA Kit is proven to show malperformance, you will receive a refund or a free replacement.
Description: A competitive inhibition quantitative ELISA assay kit for detection of Porcine Von Willebrand Factor (vWF) in samples from plasma or other biological fluids.

Porcine Von Willebrand Factor (vWF) ELISA Kit
DLR-vWF-p-96T	DL Develop	96T	EUR 715
Should the Porcine Von Willebrand Factor (vWF) ELISA Kit is proven to show malperformance, you will receive a refund or a free replacement.
Description: A competitive inhibition quantitative ELISA assay kit for detection of Porcine Von Willebrand Factor (vWF) in samples from plasma or other biological fluids.

Rat Von Willebrand Factor (vWF) ELISA Kit
DLR-vWF-Ra-48T	DL Develop	48T	EUR 508
Should the Rat Von Willebrand Factor (vWF) ELISA Kit is proven to show malperformance, you will receive a refund or a free replacement.
Description: A competitive inhibition quantitative ELISA assay kit for detection of Rat Von Willebrand Factor (vWF) in samples from plasma.

Rat Von Willebrand Factor (vWF) ELISA Kit
DLR-vWF-Ra-96T	DL Develop	96T	EUR 661
Should the Rat Von Willebrand Factor (vWF) ELISA Kit is proven to show malperformance, you will receive a refund or a free replacement.
Description: A competitive inhibition quantitative ELISA assay kit for detection of Rat Von Willebrand Factor (vWF) in samples from plasma.

Canine Von Willebrand Factor (vWF) ELISA Kit
RDR-vWF-c-48Tests	Reddot Biotech	48 Tests	EUR 557

Canine Von Willebrand Factor (vWF) ELISA Kit
RDR-vWF-c-96Tests	Reddot Biotech	96 Tests	EUR 774

Human Von Willebrand Factor (vWF) ELISA Kit
RDR-vWF-Hu-48Tests	Reddot Biotech	48 Tests	EUR 500

Human Von Willebrand Factor (vWF) ELISA Kit
RDR-vWF-Hu-96Tests	Reddot Biotech	96 Tests	EUR 692

Mouse Von Willebrand Factor (vWF) ELISA Kit
RDR-vWF-Mu-48Tests	Reddot Biotech	48 Tests	EUR 511

Mouse Von Willebrand Factor (vWF) ELISA Kit
RDR-vWF-Mu-96Tests	Reddot Biotech	96 Tests	EUR 709

Porcine Von Willebrand Factor (vWF) ELISA Kit
RDR-vWF-p-48Tests	Reddot Biotech	48 Tests	EUR 580

Porcine Von Willebrand Factor (vWF) ELISA Kit
RDR-vWF-p-96Tests	Reddot Biotech	96 Tests	EUR 807

Rat Von Willebrand Factor (vWF) ELISA Kit
RDR-vWF-Ra-48Tests	Reddot Biotech	48 Tests	EUR 534

Rat Von Willebrand Factor (vWF) ELISA Kit
RDR-vWF-Ra-96Tests	Reddot Biotech	96 Tests	EUR 742

Canine Von Willebrand Factor (vWF) ELISA Kit
RD-vWF-c-48Tests	Reddot Biotech	48 Tests	EUR 533

Canine Von Willebrand Factor (vWF) ELISA Kit
RD-vWF-c-96Tests	Reddot Biotech	96 Tests	EUR 740

Human Von Willebrand Factor (vWF) ELISA Kit
RD-vWF-Hu-48Tests	Reddot Biotech	48 Tests	EUR 478

Human Von Willebrand Factor (vWF) ELISA Kit
RD-vWF-Hu-96Tests	Reddot Biotech	96 Tests	EUR 662

Mouse Von Willebrand Factor (vWF) ELISA Kit
RD-vWF-Mu-48Tests	Reddot Biotech	48 Tests	EUR 489

Mouse Von Willebrand Factor (vWF) ELISA Kit
RD-vWF-Mu-96Tests	Reddot Biotech	96 Tests	EUR 677

Porcine Von Willebrand Factor (vWF) ELISA Kit
RD-vWF-p-48Tests	Reddot Biotech	48 Tests	EUR 555

Porcine Von Willebrand Factor (vWF) ELISA Kit
RD-vWF-p-96Tests	Reddot Biotech	96 Tests	EUR 771

Rat Von Willebrand Factor (vWF) ELISA Kit
RD-vWF-Ra-48Tests	Reddot Biotech	48 Tests	EUR 511

Rat Von Willebrand Factor (vWF) ELISA Kit
RD-vWF-Ra-96Tests	Reddot Biotech	96 Tests	EUR 709

EIA Diluent
2001-100ml	Ethos Biosciences	100 ml	EUR 282

EIA Diluent
2001-1L	Ethos Biosciences	1 Liter	EUR 1181

Cortisol EIA Kit
EK7119	BosterBio	96wells/kit	EUR 478

Cortisol EIA Kit
SKT-201-96	Stressmarq	1 plate of 96 wells	EUR 329
Cortisol, C21H30O5, (hydrocortisone, compound F) is the primary glucocorticoid produced and secreted by the adrenal cortex. It is often referred to as the ?stress hormone? as it is involved in the response to stress and it affects blood pressure, blo Show more
Description: Competitive EIA kit used for quantitative measuring cortisol present in Dried Fecal Samples, Saliva, Urine, Serum, EDTA Plasma, Heparin Plasma, Tissue Culture Media samples from all species

Corticosterone EIA Kit
SKT-205-96	Stressmarq	1 plate of 96 wells	EUR 355
Corticosterone (C21H30O4, Kendall's Compound ?B') is a glucocorticoid secreted by the cortex of the adrenal gland. Corticosterone is produced in response to stimulation of the adrenal cortex by ACTH and is the precursor of aldosterone. Corticosterone Show more
Description: Sandwich EIA kit used to measure the corticosterone present in Serum, EDTA Plasma, Heparin Plasma, Urine, Tissue Culture Media, Dried Fecal Samples samples from all species

VWF protein
30C-CP4002U	Fitzgerald	100 ug	EUR 705
Description: Purified native Human VWF protein

VWF antibody
20C-CR6077SP	Fitzgerald	1 ml	EUR 241
Description: Sheep polyclonal VWF antibody

VWF antibody
20R-1403	Fitzgerald	5 mg	EUR 303
Description: Sheep polyclonal VWF antibody

VWF antibody
20R-VG001	Fitzgerald	2.5 mg	EUR 225
Description: Goat polyclonal VWF antibody

VWF antibody
20R-VS001	Fitzgerald	5 mg	EUR 381
Description: Sheep polyclonal VWF antibody

VWF antibody
20R-VS002	Fitzgerald	5 mg	EUR 303
Description: Sheep polyclonal VWF antibody

VWF antibody
70R-10589	Fitzgerald	500 ug	EUR 512
Description: Affinity purified goat polyclonal VWF antibody

VWF antibody
70R-21290	Fitzgerald	50 ul	EUR 435
Description: Rabbit polyclonal VWF antibody

VWF Antibody
35988-100ul	SAB	100ul	EUR 252

VWF Antibody
39594-100ul	SAB	100ul	EUR 390

VWF Antibody
1-CSB-PA12779A0Rb	Cusabio	EUR 317.00 EUR 335.00	100ug 50ug
Form: Liquid Buffer: Preservative: 0.03% Proclin 300 Constituents: 50% Glycerol, 0.01M PBS, PH 7.4 >95%, Protein G purified
Description: A polyclonal antibody against VWF. Recognizes VWF from Human. This antibody is Unconjugated. Tested in the following application: ELISA, IHC; Recommended dilution: IHC:1:20-1:200

VWF Antibody
1-CSB-PA292051	Cusabio	EUR 317.00 EUR 244.00	100ul 50ul
Form: Liquid Buffer: -20°C, pH7.4 PBS, 0.05% NaN3, 40% Glycerol Antigen affinity purification
Description: A polyclonal antibody against VWF. Recognizes VWF from Human. This antibody is Unconjugated. Tested in the following application: ELISA, IHC;ELISA:1:2000-1:10000, IHC:1:50-1:200

VWF Antibody
1-CSB-PA195869	Cusabio	EUR 317.00 EUR 244.00	100ul 50ul
Form: Liquid Buffer: -20°C, pH7.4 PBS, 0.05% NaN3, 40% Glycerol Antigen affinity purification
Description: A polyclonal antibody against VWF. Recognizes VWF from Human. This antibody is Unconjugated. Tested in the following application: ELISA, IHC;ELISA:1:2000-1:5000, IHC:1:25-1:100

VWF Antibody
1-CSB-PA025960GA01HU	Cusabio	EUR 597.00 EUR 333.00	150ul 50ul
Form: Liquid Buffer: PBS with 0.02% Sodium Azide, 50% Glycerol, pH 7.3. -20℃, Avoid freeze / thaw cycles. Antigen Affinity Purified
Description: A polyclonal antibody against VWF. Recognizes VWF from Human, Mouse, Rat. This antibody is Unconjugated. Tested in the following application: ELISA, WB, IHC

vWF Protein
abx069979-100ug	Abbexa	100 ug	EUR 1156
Shipped within 5-10 working days.

VWF Antibody
AF3000	Affbiotech	200ul	EUR 376
Description: VWF Antibody detects endogenous levels of total VWF.

VWF Antibody
BF3001	Lifescience Market	100 ug	EUR 469

vWF siRNA
20-abx939623	Abbexa	EUR 551.00 EUR 732.00	15 nmol 30 nmol
Shipped within 5-10 working days.

vWF siRNA
20-abx939624	Abbexa	EUR 551.00 EUR 732.00	15 nmol 30 nmol
Shipped within 5-10 working days.

DM1 ADC EIA Kit
DEIABL311	Creative Diagnostics	96T	Ask for price
Description: This test kit is intended for use in the quantitative determination of antibody-DM1-conjugate level in test sample. It is useful for preclinical and clinical pharmacology study of DM1 Antibody Drug Conjugate (ADC). - Samples from tissue/cell culture a

MMAE ADC EIA Kit
DEIABL312	Creative Diagnostics	96T	Ask for price
Description: This test kit is intended for use in the quantitative determination of antibody-MMAE-conjugate level in test sample. It is useful for preclinical and clinical pharmacology study of MMAE Antibody Drug Conjugate (ADC). - Samples from tissue/cell culture

MMAF ADC EIA Kit
DEIABL313	Creative Diagnostics	96T	Ask for price
Description: This test kit is intended for use in the quantitative determination of antibody-MMAF-conjugate level in test sample. It is useful for preclinical and clinical pharmacology study of MMAF Antibody Drug Conjugate (ADC). - Samples from tissue/cell culture

Prostaglandin E2 EIA Kit
SKT-207-96	Stressmarq	1 plate of 96 wells	EUR 527
Eicosanoid signal transduction pathways are highly conserved and are involved in a number of physiological processes. Prostaglandins are synthesized from arachidonic acid by cyclooxygenase (COX)-1 or -2, which convert the acid into PGH2. This is furt Show more
Description: Sandwich EIA kit used for quantitative measuring PGE2 present in Saliva, Urine, Serum, EDTA Plasma, Heparin Plasma, Tissue Culture Media samples from all species

Cyclic AMP EIA Kit
SKT-209-96	Stressmarq	1 plate of 96 wells	EUR 454
Adenosine-3',5'-cyclic monophosphate (cyclic AMP) is a second messenger that plays an important role in intracellular regulation. Specifically, it functions as a mediator of activity of several key hormones including epinephrine, glucagon, and ACTH ( Show more
Description: Direct EIA kit used for quantitative measuring cAMP present in Cell Lysates, Tissue, Saliva, Urine, EDTA Plasma, Heparin Plasma, Tissue Culture Media samples from all species

Cyclic GMP EIA Kit
SKT-211-96	Stressmarq	1 plate of 96 wells	EUR 474
Guanosine 3', 5'-cyclic monophosphate (cyclic GMP cGMP) is a critical and multifunctional second messenger present at levels typically 10-100 fold lower than cAMP in most tissues. Intracellular cGMP is formed by the action of the enzyme guanylate cy Show more
Description: Direct EIA kit used for quantitative measuring cGMP present in Cell Lysates, Tissue, Saliva, Urine, EDTA Plasma, Tissue Culture Media samples from all species

Cystatin C EIA Kit
SKT-219-96	Stressmarq	1 plate of 96 wells	EUR 494
Cystatin C is a non-glycosylated protein of low molecular weight (13kDa) in the cystatin superfamily. Cystatin C is produced at a constant rate in all nucleated cells, secreted from cells and thus found in detectable amounts in most body fluids (1,2) Show more
Description: Sandwich EIA kit used to measure cystatin C levels in Serum, EDTA Plasma, Heparin Plasma, Urine, Tissue Culture Media samples from Human

EIA Wash Buffer 10x concentrate
1003-1	Ethos Biosciences	1 Liter	EUR 231

ImmunoComb Chlamydia Bivalent EIA kit
50416002	Bionote	1 kit	EUR 370.6
Description: Please check the datasheet of ImmunoComb Chlamydia Bivalent EIA kit before using the test.

Androstenedione ELISA Kit (Competitive EIA)
EK7019	BosterBio	96wells/kit, with removable strips.	EUR 688

Aldosterone EIA Kit (One Plate)
K052-H1	Arbor Assays	1x96 well plate	EUR 387

Aldosterone EIA Kit (Five Plate)
K052-H5	Arbor Assays	5x96 well plate	EUR 1355

Estriol EIA Kit (One Plate)
K064-H1	Arbor Assays	1x96 well plate	EUR 327

Estriol EIA Kit (Five Plate)
K064-H5	Arbor Assays	5x96 well plate	EUR 1110

Allopregnanolone EIA Kit (One Plate)
K044-H1	Arbor Assays	1x96 well plate	EUR 425

Allopregnanolone EIA Kit (Five Plate)
K044-H5	Arbor Assays	5x96 well plate	EUR 1490

Insulin EIA Kit (One Plate)
K046-H1	Arbor Assays	1x96 well plate	EUR 501

Prolactin EIA kit (One Plate)
K040-H1	Arbor Assays	1x96 well plate	EUR 471

Oxytocin EIA Kit (One Plate)
K048-H1	Arbor Assays	1x96 well plate	EUR 450

Oxytocin EIA Kit (Five Plate)
K048-H5	Arbor Assays	5x96 well plate	EUR 1597

Epiandrosterone EIA Kit (One Plate)
K063-H1	Arbor Assays	1x96 well plate	EUR 436

Epiandrosterone EIA Kit (Five Plate)
K063-H5	Arbor Assays	5x96 well plate	EUR 1545

Estradiol EIA kit (One Plate)
K030-H1	Arbor Assays	1x96 well plate	EUR 283

Estradiol EIA kit (Five Plates)
K030-H5	Arbor Assays	5x96 well plate	EUR 985

Estrone EIA kit (One Plate)
K031-H1	Arbor Assays	1x96 well plate	EUR 300

Estrone EIA kit (Five Plates)
K031-H5	Arbor Assays	5x96 well plate	EUR 1001

Testosterone EIA kit (One Plate)
K032-H1	Arbor Assays	1x96 well plate	EUR 316

Testosterone EIA kit (Five Plates)
K032-H5	Arbor Assays	5x96 well plate	EUR 1045

Progesterone EIA kit (One Plate)
K025-H1	Arbor Assays	1x96 well plate	EUR 305

Progesterone EIA kit (Five Plates)
K025-H5	Arbor Assays	5x96 well plate	EUR 1012

VWF Rabbit mAb
A13523-100ul	Abclonal	100 ul	EUR 410

VWF Rabbit mAb
A13523-200ul	Abclonal	200 ul	EUR 571

VWF Rabbit mAb
A13523-20ul	Abclonal	20 ul	EUR 221

VWF Rabbit mAb
A13523-50ul	Abclonal	50 ul	EUR 287

VWF antibody (FITC)
60R-1018	Fitzgerald	100 ug	EUR 358
Description: Goat polyclonal VWF antibody (FITC) conjugated

VWF antibody (biotin)
60R-1019	Fitzgerald	100 ug	EUR 392
Description: Goat polyclonal VWF antibody (biotin) conjugated

VWF antibody (HRP)
60R-1021	Fitzgerald	200 ug	EUR 358
Description: Sheep polyclonal VWF antibody (HRP) conjugated

VWF antibody (HRP)
60R-VG002hrp	Fitzgerald	150 ug	EUR 358
Description: Goat polyclonal VWF antibody (HRP) conjugated

VWF antibody (HRP)
60R-VS001hrp	Fitzgerald	200 ug	EUR 358
Description: Sheep polyclonal VWF antibody (HRP) conjugated

VWF: CBA ELISA
55R-1002	Fitzgerald	96 tests	EUR 909
Description: ELISA kit for the detection of von Willebrand Factor

VWF, VWFpp Antibody
abx239466-100ug	Abbexa	100 ug	EUR 509
Shipped within 5-12 working days.

VWF Blocking Peptide
AF3000-BP	Affbiotech	1mg	EUR 195

VWF Conjugated Antibody
C35988	SAB	100ul	EUR 397

VWF cloning plasmid
CSB-CL025960HU-10ug	Cusabio	10ug	EUR 233
Formulation: 10 μg plasmid + 200μl Glycerol Length: 822 Sequence: atgggggcacaggatgaggaggaaggaatccaagacttggatggattattagttttcgataagattgtggaggtcaccttgttgaacctcccatggtacaatgaagagactgagggtcagagaggagaaatgactgctccaaagtctcctagagccaaaatcagagggaccctttg Show more
Description: A cloning plasmid for the VWF gene.

vWF Acty. Kit
ABP-ACT-KIT	Abpcorp	12 x 8 microwells	EUR 428

There was high prevalence of psychoactive drug use among the students at the higher education institution investigated. Some variables (female sex, medicalstudents and low academic performance) were associated with the outcome.