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The threads were analysed by conventional content analysis where concepts were developed from codes and themes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The study identified 3 main themes in relation to cathinone use, effects, and toxicity. The first theme considered the modalities of intake of cathinones in relation to the derivative taken (mainly mephedrone, 3\u2010methylmethcathinone, and methylenedioxypyrovalerone), route of administration (eyeballing, insufflation, smoking, intravenous, oral, rectal, and sublingual), multidrug use, and purity of the cathinone derivative. The second theme characterised the main effects of cathinones, that is, increased energy, euphoria, and empathogenic. Toxic effects were reported regarding the nervous system (anxiety, hallucinations, nervousness, and paranoia), cardiovascular system (angina, myocardial infarction, and tachycardia), skin (discolouration, itching, and allergy), and renal system (difficulty in urination). Drug\u2013drug interactions were also reported including multiple drug use between cathinones, stimulants, depressants, and hallucinogens.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The Internet discussion forums provide useful sources of information regarding the effects and toxicity of cathinones, which can be taken into account when assessing the safety of drugs.<\/jats:p><\/jats:sec>","DOI":"10.1002\/hup.2610","type":"journal-article","created":{"date-parts":[[2017,6,20]],"date-time":"2017-06-20T06:29:12Z","timestamp":1497940152000},"source":"Crossref","is-referenced-by-count":34,"title":["The effects and toxicity of cathinones from the users' perspectives: A qualitative study"],"prefix":"10.1002","volume":"32","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5142-9179","authenticated-orcid":false,"given":"Sulaf","family":"Assi","sequence":"first","affiliation":[{"name":"Department of Archaeology, Anthropology and Forensic Science Bournemouth University  Poole UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nargilya","family":"Gulyamova","sequence":"additional","affiliation":[{"name":"Department of Archaeology, Anthropology and Forensic Science Bournemouth University  Poole UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul","family":"Kneller","sequence":"additional","affiliation":[{"name":"Department of Archaeology, Anthropology and Forensic Science Bournemouth University  Poole UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Osselton","sequence":"additional","affiliation":[{"name":"Department of Archaeology, Anthropology and Forensic Science Bournemouth University  Poole UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2017,6,20]]},"reference":[{"key":"e_1_2_6_2_1","unstructured":"Advisory Committee for Misuse of Drugs (ACMD). 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