{"id":7265,"date":"2025-08-17T00:01:00","date_gmt":"2025-08-17T08:01:00","guid":{"rendered":"https:\/\/www.osmosis.org\/blog\/?p=7265"},"modified":"2025-10-02T13:08:03","modified_gmt":"2025-10-02T21:08:03","slug":"dosage-calculation-lithium","status":"publish","type":"post","link":"https:\/\/www.osmosis.org\/blog\/dosage-calculation-lithium","title":{"rendered":"Dosage Calculation: Lithium"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">In This Article<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.osmosis.org\/blog\/dosage-calculation-lithium\/#Key_Takeaways\" >Key Takeaways<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.osmosis.org\/blog\/dosage-calculation-lithium\/#Want_to_learn_more_about_this_topic\" >Want to learn more about this topic?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\"><strong><em>Effective lithium management is crucial for <a href=\"https:\/\/www.osmosis.org\/blog\/understanding-mood-disorders-a-helpful-guide-for-health-professionals\">bipolar disorder<\/a> care. With 600 mg tablets available, how many tablets should be given per dose? Do you know the answer? Let&#8217;s find out!<\/em><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A patient newly diagnosed with bipolar disorder is prescribed lithium 900 mg\/day PO divided into four separate doses. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Twelve hours after taking the first dose, the patient has a serum lithium blood level drawn, which results in a level of 0.4 mEq\/L. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The patient\u2019s dose is increased to 1200 mg\/day divided into four separate doses. Lithium tablets are available in a 600 mg formulation. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>How many tablet(s) should the nurse administer to the patient per dose? <\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Round to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero. <\/li>\n\n\n\n<li>Any rounding should be completed at the end of the calculation. <\/li>\n\n\n\n<li>The answer must be numeric only. Do not add any units of measurement.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><em><strong>Scroll down for the answer!<\/strong><\/em><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" height=\"1024\" width=\"1024\" src=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/08\/Dosage-Calculation-Lithium-Answer.png?w=1024\" alt=\"DOSAGE CALCULATION\nRx Desired - Total Dosage\/Day \/ # of doses\/day\nDesired = 1200 mg\/day \/ 4 doses\/day\nX = Desired x Quantity\/Have\nX = 300 mg x 1 tablet\/600 mg\nX = .5 tablets\nAnswer: 0.5 tablets\" class=\"wp-image-7268\" srcset=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/08\/Dosage-Calculation-Lithium-Answer.png 1080w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/08\/Dosage-Calculation-Lithium-Answer.png?resize=150,150 150w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/08\/Dosage-Calculation-Lithium-Answer.png?resize=300,300 300w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/08\/Dosage-Calculation-Lithium-Answer.png?resize=768,768 768w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/08\/Dosage-Calculation-Lithium-Answer.png?resize=1024,1024 1024w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Key_Takeaways\"><\/span>Key Takeaways<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Lithium dosing often requires dividing total daily dose into multiple administrations.<\/li>\n\n\n\n<li>Tablet strength influences how many tablets are given per dose.<\/li>\n\n\n\n<li>Blood lithium levels guide safe dose adjustments.<\/li>\n\n\n\n<li>Accurate rounding is essential to avoid dosing errors.<\/li>\n\n\n\n<li>Understanding dose calculation improves patient safety and treatment efficacy.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Want_to_learn_more_about_this_topic\"><\/span>Want to learn more about this topic? <span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Watch the Osmosis video: <a href=\"https:\/\/www.osmosis.org\/learn\/Mood_stabilizers:_Nursing_Pharmacology\">Mood stabilizers: Nursing pharmacology<\/a><\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.osmosis.org\/plans\/rn\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"250\" src=\"https:\/\/hm-healthdigital-multisite.go-vip.net\/osmosisblog\/wp-content\/uploads\/sites\/2\/2025\/01\/Blog_Display_Ads_RN1_2023_535910.png\" alt=\"\" class=\"wp-image-5083\" srcset=\"https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/01\/Blog_Display_Ads_RN1_2023_535910.png 700w, https:\/\/www.osmosis.org\/blog\/wp-content\/uploads\/sites\/2\/2025\/01\/Blog_Display_Ads_RN1_2023_535910.png?resize=300,107 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em>Access your&nbsp;<a href=\"https:\/\/www.osmosis.org\/login?type=create\" target=\"_blank\" rel=\"noreferrer noopener\">free trial<\/a>&nbsp;to Osmosis today and discover why millions of nurses love learning with us<\/em><\/strong>!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A patient\u2019s lithium dose is adjusted for bipolar disorder using 600 mg tablets divided into multiple doses. Can you calculate the correct tablets per dose?<\/p>\n","protected":false},"author":207,"featured_media":7267,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[20,29,32],"tags":[1398,1400,1401,1396,1399,1273,1397,815,149,1402],"class_list":["post-7265","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-exam-prep","category-nclex","category-nursing","tag-bipolar-disorder","tag-dose-adjustment","tag-lithium-blood-levels","tag-lithium-dosing","tag-lithium-tablets","tag-medication-calculation","tag-mood-stabilizers","tag-nursing-pharmacology","tag-patient-care","tag-psychiatric-nursing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Dosage Calculation: Lithium - Osmosis Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.osmosis.org\/blog\/dosage-calculation-lithium\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dosage Calculation: Lithium - Osmosis Blog\" \/>\n<meta property=\"og:description\" content=\"A patient\u2019s lithium dose is adjusted for bipolar disorder using 600 mg tablets divided into multiple doses. 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