How soon does Effexor start to work?
By
Dr Milena Locci de Oliveira (PhD)
Author bio
Dr Milena Locci de Oliveira is a Pharmacist and Doctor of Philosophy in Sciences from the University of São Paulo (USP). She has experience in microbiology, analytical toxicology, and clinical pharmacokinetics. She writes and reviews content on these topics.
Dr Milena’s Highlights:
-PhD in Sciences, University of São Paulo, Brazil, 2019.
-University College London (UCL) – Semester of remote collaboration in the areas of Pharmacometrics and Population Pharmacokinetics, 2018.
-Bachelor in Biochemical Pharmacy, University of São Paulo, Brazil, 2013.
“Science can be translated, and it is essential that everyone has access to quality information to make informed decisions” – Dr Milena Oliveira, PhD.
Professional Experience:
With a decade-long career as a researcher, Dr Milena has amassed extensive experience in conducting research projects in microbiology, analytical toxicology, and clinical pharmacokinetics.
Her expertise also extends to the preparation of technical and scientific reports, literature reviews, data analysis, and scientific communication, both oral and written.
Dr Milena has served as a Clinical Pharmacist, providing expert supervision and guidance to teams during the challenging times of the COVID-19 pandemic, particularly in the ICUs of two reference hospitals for patient hospitalization.
In her most recent role, Dr Milena worked on the implementation of the deliberatives of the São Paulo State Government Pharmaceutical Assistance Coordination. These decisions were aimed at ensuring medication access within the Unified Health System.
A widely multidisciplinary background enabled Dr Milena to become a professional capable of integrating scientific knowledge into private initiatives, education, and healthcare, delivering consistent services in patient safety and population health.
Professional Memberships & Affiliations:
Dr Milena Oliveira is a member of the Regional Council of Pharmacy of the State of São Paulo, Brazil.
Education:
-PhD in Sciences, University of São Paulo, Brazil, 2019.
-University College London (UCL) – Semester of remote collaboration, 2018.
-Bachelor in Biochemical Pharmacy, University of São Paulo, Brazil, 2013.
Relevant Published Work & Citations:
Oliveira ML de, Rocha A, Nardotto GHB, Pippa LF, Simões BP, Lanchote VL. Analysis of daunorubicin and its metabolite daunorubicinol in plasma and urine with application in the evaluation of total, renal and metabolic formation clearances in patients with acute myeloid leukemia. Journal of Pharmaceutical and Biomedical Analysis. Nov 2020. 191:113-124.
Abstracts. CPT: Pharmacometrics & Systems Pharmacology. 2020 Nov; 9 (S1).
Pippa LF, Oliveira ML de, Rocha A, de Andrade JM, Lanchote VL. Total, renal and hepatic clearances of doxorubicin and formation clearance of doxorubicinol in patients with breast cancer: Estimation of doxorubicin hepatic extraction ratio. Journal of Pharmaceutical and Biomedical Analysis. 2020 Jun 5; 185:113-231.
Godoy ALPC, De Jesus C, De Oliveira ML, Rocha A, Pereira MPM, Larangeira DF, Lanchote VL, Barrouin-Melo SM. Determination of Allopurinol and Oxypurinol in Dogs Plasma by High-Performance Liquid Chromatography with an Ultraviolet Detector: Application for Pharmacokinetic Studies. J Chromatogr Sep Tech. 2017; 8 (4).
Clímaco EC, Oliveira ML de, Pitondo-Silva A, Oliveira MG, Medeiros M, Lincopan N, et al. Clonal complexes 104, 109 and 113 playing a major role in the dissemination of OXA-carbapenemase-producing Acinetobacter baumannii in Southeast Brazil. Infection, Genetics and Evolution. 2013 Oct;19:127–33.
Conference Papers:
Oliveira, M. L.; NARDOTTO, G. H. B.; PIPPA, L. F.; ROCHA, A.; SIMOES, B. P.; LANCHOTE, V. L. . Daunorubicin metabolism and urinary excretion in patients with acute myeloid leukemia. In: 84th Annual Meeting of the German Society for Experimental and Clinical Pharmacology and Toxicology (DGPT) and the 20th Annual Meeting of the Association of the Clinical Pharmacology Germany (VKliPha), 2018, Göttingen. Naunyn-Schmiedeberg’s Arch Pharmacol, 2018. v. 391. p. S76-S76.
Oliveira, M. L.; NARDOTTO, G. H. B. ; ROCHA, A. ; SIMOES, B. P. ; LANCHOTE, V. L. . The low contribution of urinary excretion in the elimination of daunorubicin and its metabolite daunorubicinol in patients with acute myeloid leukemia. In: 49th Brazilian Congress of Pharmacology and Experimental Therapeutics., 2017, Ribeirão Preto. Livro de Resumos, 2017. p. 64-64.
Oliveira, M. L.; PIPPA, L. F. ; ROCHA, A. ; SIMOES, B. P. ; LANCHOTE, V. L. . Quantification of daunorubicin and its metabolite daunorubicinol in human plasma by LC-MS/MS. In: I International Meeting of Environmental Health and Toxicology (IMEHTOX), 2016, Ribeirão Preto. Livro de Resumos, 2016.
Oliveira, M. L.; Clímaco, E.C. ; OLIVEIRA, M. G. ; Lincopan, N. ; Darini A.L.C. . PFGE typing of Carbapenem-Resistant Acinetobacter baumannii isolated from different University Hospitals. In: V International Postgraduate and Research Symposium, 2012.
Clímaco, E.C. ; SILVA, A. P. ; Oliveira, M. L. ; OLIVEIRA, M. G. ; Lincopan, N. ; Darini A.L.C. Relação clonal entre linhagens de Acinetobacter baumannii produtoras de carbapenemases da família OXA em quatro hospitais no Brasil. In: XXI Latin American Congress of Microbiology, 2012, Santos. XXI Latin American Congress of Microbiology, 2012.
Oliveira, M. L.; Clímaco, E.C. ; OLIVEIRA, M. G. ; Darini A.L.C. . Dissemintion of OXA carbapenemases genes in carbapenem-resistant Acinetobacter baumannii in University Hospital of Juiz de Fora, MG. In: 8th CIFARP – International Congress of Pharmaceutical Sciences, 2011, Ribeirão Preto.
Clímaco, E.C. ; Oliveira, M. L. ; OLIVEIRA, M. G. ; Darini A.L.C. . Avaliação do sequenciamento parcial do gene rpoB e de seus flanqueadores para identificação de espécies de Acinetobacter na rotina laroratorial. In: 2° International Symposium on Clinical Microbiology, 2010, Florianópolis.
You can view some of Dr Milena’s work below and links to her professional profile.
Linkedin: https://www.linkedin.com/in/dra-milena-locci-de-oliveira-28986042/?locale=en_US
ResearchGate: https://www.researchgate.net/profile/Milena-Oliveira-6
Escavador: https://www.escavador.com/sobre/5394254/milena-locci-de-oliveira
Lattes: https://buscatextual.cnpq.br/buscatextual/busca.do
Scopus: https://www.scopus.com/authid/detail.uri?authorId=57199779361
Scholar: https://scholar.google.com/citations?view_op=list_works&hl=pt-BR&user=1YUBDIQAAAAJ
How soon does Effexor start to work?
Effexor starts to work in about 4-6 weeks, but you may feel less depressed in 2-3 weeks. The time taken by Effexor to start working may vary from person to person and depend on the overall severity of your mental health condition.
If we talk about mild depression, you will definitely feel better in a few weeks, as compared to a person battling major depressive disorder (MDD) who needs weeks and weeks of treatment for noticeable antidepressant effects.
Effexor and other depressants are not fast-acting meds which can provide you with instant relief. Taking antidepressants is a long-term commitment.
Effexor gradually increases the number of excitatory neurotransmitters in your brain – serotonin and norepinephrine – a change to which your body takes time to adjust.
You may feel unwell during the first 2 weeks and experience side effects like nausea, dizziness, tiredness, drowsiness, or insomnia – but these side effects go away once your body fully accepts the medication. This could get nerve-racking for some people, but it does get better with time.
What if Effexor does not work well?
Effexor may not work well in some individuals, although it is generally a well-tolerated antidepressant – but don’t worry! There are plenty of other antidepressants to replace Effexor if it doesn’t provide adequate relief for your symptoms.
Determining the best antidepressant is a trial and error process, and it could take multiple attempts to find ‘The one‘. So don’t worry if Effexor doesn’t work well for you.
Your doctor will switch you to another antidepressant in the best possible way to avoid withdrawal symptoms and manage your depression properly. Make sure you don’t make such changes without your doctor’s approval.
Final words
To sum up, Effexor can take a few weeks to start working. Although it is generally a well-tolerated antidepressant, it may not work well for every other individual. Some people may discontinue taking Effexor even before it kicks in because of the early side effects.
This is not uncommon for doctors to switch antidepressants because of unbearable side effects. If for some reason, Effexor fails to help your mental health condition, there are plenty of antidepressants that can replace it.
Just make sure you discuss your side effects and overall progress with your doctor. It is not wise to judge an antidepressant before giving it enough time to work. If it doesn’t make you feel better even after weeks and weeks of your treatment, your doctor will safely switch you to another one.
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References
1.-
National Library of Medicine (US). Venlafaxine. Bethesda (MD): U.S. National Library of Medicine; 2021 Mar 15 [updated 2021 Mar 15; cited 2022 Feb 21]. Available from: https://medlineplus.gov/druginfo/meds/a694020.html
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