Select a medication above to begin.
Krazati
adagrasib
Adult Dosing .
Dosage forms: DR TAB: 60 mg
Special Note
- [equivalency or interchangeability info]
- Info: 60 mg Doryx MPC = 50 mg Doryx
infections, mild-moderate bacterial
- [120 mg PO qd]
- Start: 120 mg PO bid x1 day; Info: duration varies by indication; do not cut/crush/chew tab
infections, severe bacterial
- [120 mg PO bid]
- Info: duration varies by indication; do not cut/crush/chew tab
severe acne vulgaris, adjunct tx
- [120 mg PO q12h]
- Info: do not cut/crush/chew tab
pneumonia, community-acquired
- [120 mg PO q12h for at least 5 days]
- Info: refer to IDSA guidelines; do not cut/crush/chew tab
sinusitis, acute bacterial
- [240 mg/day PO divided q12-24h x5-7 days]
- Info: do not cut/crush/chew tab
infections, chlamydial
- [treatment]
- Dose: 120 mg PO q12h x7 days; Info: 1st-line agent; do not cut/crush/chew tab
- [presumptive tx (off-label)]
- Dose: 120 mg PO q12h x7 days; Info: for sexual assault victims; give w/ ceftriaxone and metronidazole in female patients; give w/ ceftriaxone in male patients; do not cut/crush/chew tab
- [post-exposure prophylaxis (off-label)]
- Dose: 240 mg PO x1; Start: w/in 72h of oral, vaginal, or anal sex; Max: 240 mg/24h; Info: for men and transgender women who have sex with men w/ history of at least 1 bacterial sexually transmitted infection during the past 12mo; may repeat dose; do not cut/crush/chew tab
syphilis
- [primary, secondary, or latent <1y]
- Dose: 120 mg PO q12h x14 days; Info: for patients w/ hypersens. to PCN; not 1st-line agent; do not cut/crush/chew tab
- [latent >1y or unknown duration]
- Dose: 120 mg PO q12h x28 days; Info: for patients w/ hypersens. to PCN; not 1st-line agent; do not cut/crush/chew tab
- [post-exposure prophylaxis (off-label)]
- Dose: 240 mg PO x1; Start: w/in 72h of oral, vaginal, or anal sex; Max: 240 mg/24h; Info: for men and transgender women who have sex with men w/ history of at least 1 bacterial sexually transmitted infection during the past 12mo; may repeat dose; do not cut/crush/chew tab
lymphogranuloma venereum
- [120 mg PO q12h x21 days]
- Info: may give for 7 days if asymptomatic disease; 1st-line agent; do not cut/crush/chew tab
urethritis, non-gonococcal
- [120 mg PO q12h x7 days]
- Info: 1st-line agent; do not cut/crush/chew tab
epididymitis
- [120 mg PO q12h x10 days]
- Info: give w/ ceftriaxone; do not cut/crush/chew tab
proctitis
- [120 mg PO q12h x7 days]
- Info: give w/ ceftriaxone; extend duration to 21 days if positive rectal chlamydia test w/ bloody discharge, perianal or mucosal ulcers, or tenesmus; do not cut/crush/chew tab
anthrax
- [systemic]
- Dose: 120 mg PO q12h; Start: use after IV tx; Info: not recommended for CNS anthrax; may use in pregnant patients; not 1st-line agent; part of multi-drug regimen; continue abx for post-exposure prophylaxis if inhalational exposure; do not cut/crush/chew tab
- [cutaneous]
- Dose: 120 mg PO q12h x7-10 days; Info: for non-systemic infection; 1st-line agent; use extended duration for post-exposure prophylaxis if bioterrorism suspected; may use in pregnant patients; do not cut/crush/chew tab
- [post-exposure prophylaxis]
- Dose: 120 mg PO q12h x60 days; Info: 1st-line agent; give in combo w/ anthrax vaccine; may use in pregnant patients; may give x42 days, or x14 days after last vaccine dose, in immunocompetent patients 18-65 yo if anthrax vaccine regimen completed; do not cut/crush/chew tab
malaria prophylaxis
- [120 mg PO qd]
- Start: 1-2 days before exposure; Info: do not cut/crush/chew tab; D/C 4wk after exposure; see CDC Pre-Travel Malaria Prophylaxis recommendations in Guidelines > Specialties > Infectious Diseases
tularemia
- [120 mg PO q12h x14-21 days]
- Info: do not cut/crush/chew tab
Rocky Mountain spotted fever
- [120 mg PO q12h x5-14 days]
- Info: do not cut/crush/chew tab
cholera
- [360 mg PO x1]
- Info: do not cut/crush/chew tab
brucellosis
- [120 mg PO q12h x6wk]
- Info: part of multi-drug regimen; do not cut/crush/chew tab
granuloma inguinale
- [120 mg PO q12h for at least 3wk]
- Info: may extend tx if not healed after 3wk; not 1st-line agent; do not cut/crush/chew tab
gonococcal infections, post-exposure prophylaxis (off-label)
- [240 mg PO x1 dose]
- Start: w/in 72h of oral, vaginal, or anal sex; Max: 240 mg/24h; Info: for men and transgender women who have sex with men w/ history of at least 1 bacterial sexually transmitted infection during the past 12mo; may repeat dose; do not cut/crush/chew tab
PID (off-label)
- [mild-moderate infection]
- Dose: 120 mg PO q12h x14 days; Info: give w/ ceftriaxone and metronidazole, cefotaxime and metronidazole, or cefoxitin plus probenecid and metronidazole; 1st-line agent; do not cut/crush/chew tab
- [severe infection]
- Dose: 120 mg PO q12h x14 days; Info: give w/ ceftriaxone plus metronidazole, cefotetan, cefoxitin, ampicillin/sulbactam, or cefotaxime plus metronidazole; 1st-line agent; do not cut/crush/chew tab
Lyme disease (off-label)
- [120 mg PO q12h x14-21 days]
- Alt: 240 mg q24h x14-21 days; Info: may give for 10-14 days if early localized disease; extend duration to 28 days if Lyme arthritis; 1st-line agent; do not cut/crush/chew tab; search 'Lyme' for epocrates Lyme Disease Dx & Tx decision tool
Lyme disease prophylaxis, post-exposure (off-label)
- [240 mg PO x1 dose]
- Start: w/in 72h of tick removal after high-risk bite; Info: do not cut/crush/chew tab; search 'Lyme' for epocrates Lyme Disease Dx & Tx decision tool
cervicitis, presumptive (off-label)
- [120 mg PO q12h x7 days]
- Info: 1st-line agent; do not cut/crush/chew tab
Mycoplasma genitalium infection (off-label)
- [macrolide-susceptible]
- Dose: 120 mg PO q12h x7 days; Info: follow w/ azithromycin 1 g PO x1, then 500 mg PO qd x3 days; do not cut/crush/chew tab
- [macrolide-resistant or resistance unknown]
- Dose: 120 mg PO q12h x7 days; Info: follow w/ moxifloxacin 400 mg PO qd x7 days; do not cut/crush/chew tab
endocarditis prophylaxis, dental (off-label)
- [120 mg PO x1]
- Start: 30-60min before procedure; Info: see Infectious Disease: Endocarditis Prophylaxis, Adult table
malaria tx, uncomplicated (off-label)
- [120 mg PO q12h x7 days]
- Info: give w/ quinine sulfate; follow up tx w/ primaquine to avoid relapse in acute P. vivax or P. ovale infection; refer to CDC guidelines; do not cut/crush/chew tab
non-cholera vibrio infection, gastroenteritis (off-label)
- [120 mg PO q12h x3 days]
- Info: for diarrhea persisting >5 days; do not cut/crush/chew tab
anaplasmosis (off-label)
- [120 mg PO q12h x10-14 days]
- Info: do not cut/crush/chew tab
ehrlichiosis (off-label)
- [120 mg PO q12h x5-14 days]
- Info: do not cut/crush/chew tab
onchocerciasis (off-label)
- [240 mg PO qd x6wk]
- Start: 1wk after ivermectin tx; Info: may decr. to 120 mg PO qd if not tolerated; not 1st-line agent; do not cut/crush/chew tab
renal dosing
- [no adjustment]
- renal impairment: no adjustment
- HD/PD: no adjustment; no supplement
hepatic dosing
- [not defined]
Peds Dosing .
- Dosage forms: DR TAB: 60 mg
Special Note
- [equivalency or interchangeability info]
- Info: 60 mg Doryx MPC = 50 mg Doryx
infections, mild-moderate bacterial
- [>8 yo]
- Dose: 2.6 mg/kg/dose PO qd; Start: 2.6 mg/kg/dose PO bid x1 day; Max: 120 mg/dose; Info: duration varies by indication; do not cut/crush/chew tab
infections, severe bacterial
- [>8 yo]
- Dose: 2.6 mg/kg/dose PO bid; Max: 120 mg/dose; Info: duration varies by indication; do not cut/crush/chew tab
severe acne vulgaris, adjunct tx
- [>8 yo]
- Dose: 2.6 mg/kg/dose PO qd; Start: 2.6 mg/kg/dose PO bid x1 day; Max: 120 mg/dose; Info: do not cut/crush/chew tab
community-acquired pneumonia, atypical
- [>8 yo]
- Dose: 2.6-5.2 mg/kg/day PO divided q12h x7-10 days; Info: do not cut/crush/chew tab
infections, chlamydial
- [treatment, 8 yo and older]
- Dose: 120 mg PO q12h x7 days; Info: 1st-line agent; do not cut/crush/chew tab
- [presumptive tx, 8 yo and older (off-label)]
- Dose: 120 mg PO q12h x7 days; Info: for sexual assault victims; give w/ ceftriaxone and metronidazole in female patients; give w/ ceftriaxone in male patients; do not cut/crush/chew tab
syphilis
- [primary, secondary, or latent <1y, adolescents]
- Dose: 120 mg PO q12h x14 days; Info: for patients w/ hypersens. to PCN; not 1st-line agent; do not cut/crush/chew tab
- [latent >1y or unknown duration, adolescents]
- Dose: 120 mg PO q12h x28 days; Info: for patients w/ hypersens. to PCN; not 1st-line agent; do not cut/crush/chew tab
lymphogranuloma venereum
- [preadolescents >45 kg and adolescents]
- Dose: 120 mg PO q12h x21 days; Info: may give for 7 days if asymptomatic disease; 1st-line agent; do not cut/crush/chew tab
urethritis, non-gonococcal
- [preadolescents >45 kg and adolescents]
- Dose: 120 mg PO q12h x7 days; Info: 1st-line agent; do not cut/crush/chew tab
epididymitis
- [preadolescents >45 kg and adolescents]
- Dose: 120 mg PO q12h x10 days; Info: give w/ ceftriaxone; do not cut/crush/chew tab
proctitis
- [preadolescents >45 kg and adolescents]
- Dose: 120 mg PO q12h x7 days; Info: give w/ ceftriaxone; extend duration to 21 days if positive rectal chlamydia test w/ bloody discharge, perianal or mucosal ulcers, or tenesmus; do not cut/crush/chew tab
anthrax
- [systemic]
- Dose: 2.6 mg/kg/dose PO q12h; Start: use after IV tx; Max: 120 mg/dose; Info: not recommended for CNS anthrax; not 1st-line agent; part of multi-drug regimen; give x60 days total if inhalational exposure; do not cut/crush/chew tab
- [cutaneous]
- Dose: 2.6 mg/kg/dose PO q12h x7-10 days; Max: 120 mg/dose; Info: for non-systemic infection; give abx x60 days total if bioterrorism suspected; do not cut/crush/chew tab
- [post-exposure prophylaxis]
- Dose: 2.6 mg/kg/dose PO q12h x60 days; Max: 120 mg/dose; Info: 1st-line agent; do not cut/crush/chew tab
malaria prophylaxis
- [>8 yo]
- Dose: 2.6 mg/kg/dose PO qd; Start: 1-2 days before exposure; Max: 120 mg/day; Info: D/C 4wk after exposure; do not cut/crush/chew tab; see CDC Pre-Travel Malaria Prophylaxis recommendations in Guidelines > Specialties > Infectious Diseases
Rocky Mountain spotted fever
- [2.6 mg/kg/dose PO q12h x5-14 days]
- Max: 120 mg/dose; Info: do not cut/crush/chew tab
cholera
- [>8 yo]
- Dose: 5.2-8 mg/kg/dose PO x1; Max: 360 mg/dose; Info: do not cut/crush/chew tab
brucellosis
- [>8 yo]
- Dose: 120 mg PO q12h x6wk; Info: part of multi-drug regimen; do not cut/crush/chew tab
granuloma inguinale
- [adolescents]
- Dose: 120 mg PO q12h for at least 3wk; Info: may extend tx if not healed after 3wk; not 1st-line agent; do not cut/crush/chew tab
PID (off-label)
- [mild-moderate infection, preadolescents >45 kg and adolescents]
- Dose: 120 mg PO q12h x14 days; Info: give w/ ceftriaxone and metronidazole, cefotaxime and metronidazole, or cefoxitin plus probenecid and metronidazole; 1st-line agent; do not cut/crush/chew tab
- [severe infection, preadolescents >45 kg and adolescents]
- Dose: 120 mg PO q12h x14 days; Info: give w/ ceftriaxone plus metronidazole, cefotetan, cefoxitin, ampicillin/sulbactam, or cefotaxime plus metronidazole; 1st-line agent; do not cut/crush/chew tab
Lyme disease (off-label)
- [2.6 mg/kg/dose PO q12h x14-21 days]
- Max: 120 mg/dose; Info: may give for 10-14 days if early localized disease; extend duration to 28 days if Lyme arthritis; 1st-line agent; do not cut/crush/chew tab; search 'Lyme' for epocrates Lyme Disease Dx & Tx decision tool
Lyme disease prophylaxis, post-exposure (off-label)
- [5.2 mg/kg/dose PO x1 dose]
- Start: w/in 72h of tick removal after high-risk bite; Max: 240 mg/dose; Info: do not cut/crush/chew tab; search 'Lyme' for epocrates Lyme Disease Dx & Tx decision tool
cervicitis, presumptive (off-label)
- [preadolescents >45 kg and adolescents]
- Dose: 120 mg PO q12h x7 days; Info: 1st-line agent; do not cut/crush/chew tab
Mycoplasma genitalium infection (off-label)
- [macrolide-susceptible, adolescents]
- Dose: 120 mg PO q12h x7 days; Info: follow w/ azithromycin 1 g PO x1, then 500 mg PO qd x3 days; do not cut/crush/chew tab
- [macrolide-resistant or resistance unknown, adolescents]
- Dose: 120 mg PO q12h x7 days; Info: follow w/ moxifloxacin 400 mg PO qd x7 days; do not cut/crush/chew tab
endocarditis prophylaxis, dental (off-label)
- [<45 kg]
- Dose: 2.6 mg/kg/dose PO x1; Start: 30-60min before procedure; Info: see Infectious Disease: Endocarditis Prophylaxis, Pediatric table
- [>45 kg]
- Dose: 120 mg PO x1; Start: 30-60min before procedure; Info: see Infectious Disease: Endocarditis Prophylaxis, Pediatric table
malaria tx, uncomplicated (off-label)
- [2.6 mg/kg/dose PO q12h x7 days]
- Max: 120 mg/dose; Info: give w/ quinine sulfate; follow up tx w/ primaquine to avoid relapse in acute P. vivax or P. ovale infection; refer to CDC guidelines; do not cut/crush/chew tab
non-cholera vibrio infection, gastroenteritis (off-label)
- [>8 yo, <45 kg]
- Dose: 2.6 mg/kg/dose PO q12h x3 days; Max: 240 mg/day; Info: for diarrhea persisting >5 days; do not cut/crush/chew tab
- [>8 yo, >45 kg]
- Dose: 120 mg PO q12h x3 days; Info: for diarrhea persisting >5 days; do not cut/crush/chew tab
non-cholera vibrio infection, invasive disease (off-label)
- [>8 yo, <45 kg]
- Dose: 2.6 mg/kg/dose PO q12h; Max: 240 mg/day; Info: part of multi-drug regimen; do not cut/crush/chew tab
- [>8 yo, >45 kg]
- Dose: 120 mg PO q12h; Info: part of multi-drug regimen; do not cut/crush/chew tab
anaplasmosis (off-label)
- [2.6 mg/kg/dose PO q12h x10-14 days]
- Max: 120 mg/dose; Info: do not cut/crush/chew tab
ehrlichiosis (off-label)
- [2.6 mg/kg/dose PO q12h x5-14 days]
- Max: 120 mg/dose; Info: do not cut/crush/chew tab
onchocerciasis (off-label)
- [240 mg PO qd x6wk]
- Start: 1wk after ivermectin tx; Info: may decr. to 120 mg PO qd if not tolerated; not 1st-line agent; do not cut/crush/chew tab
renal dosing
- [no adjustment]
- renal impairment: no adjustment
- HD/PD: no adjustment; no supplement
hepatic dosing
- [not defined]
Contraindications / Cautions .
- hypersensitivity to drug or ingredient
- hypersensitivity to tetracyclines
- pregnancy (except anthrax infection or malaria tx use)
- patients <8 yo
- avoid: breastfeeding during tx and x5 days after D/C (Lyme disease use)
- avoid: breastfeeding (>3wk tx duration except in Lyme disease use)
- avoid: sun exposure
- avoid: UV light exposure, artificial
- caution: overweight patients of childbearing potential
- caution: patients of childbearing potential w/ intracranial HTN history
- caution: loiasis and onchocerciasis, concurrent
- caution: abx-associated colitis history, recent
- caution: botulism
Drug Interactions .
Overview
doxycycline
tetracycline
- affected by altered gastrointestinal motility
- alters GI flora
- bacteriostatic agent
- binds to anion exchange resin/polymer
- binds to polyvalent cations
- impairs immunomodulatory bacterial infective agent
- photosensitivity
- potentiates neuromuscular blockade
- pseudotumor cerebri
Contraindicated
- acitretin
Avoid/Use Alternative
- aminolevulinic acid topical
- BCG live intravesical
- bremelanotide
- cholera vaccine, live
- fecal microbiota, live
- isotretinoin
- methotrexate
- palovarotene
- porfimer
- tretinoin
- tretinoin topical
- typhoid vaccine, live
Monitor/Modify Tx
- aluminum hydroxide
- ascorbic acid (vitamin C)
- atracurium
- bismuth subsalicylate
- calcium acetate
- calcium carbonate
- calcium citrate
- calcium gluconate
- cholestyramine
- chromium
- ciprofloxacin
- cisatracurium
- colestipol
- cyclosporine
- cysteamine
- danazol
- delafloxacin
- exenatide
- ferric citrate
- ferric maltol
- ferrous fumarate
- ferrous gluconate
- ferrous sulfate
- goserelin
- histrelin
- lanthanum
- leuprolide
- levofloxacin
- lithium
- lixisenatide
- magnesium carbonate
- magnesium citrate
- magnesium hydroxide
- magnesium oxide
- magnesium supplement
- mecasermin
- molindone
- moxifloxacin
- nafarelin nasal
- ofloxacin
- pramlintide
- quinapril
- rocuronium
- somapacitan
- somatrogon
- somatropin
- succinylcholine
- sucralfate
- sucroferric oxyhydroxide
- sulfate bowel prep
- triptorelin
- vecuronium
- warfarin
- zinc oral
Caution Advised
- amoxicillin
- ampicillin
- butalbital
- carbamazepine
- cefaclor
- cefadroxil
- cefazolin
- cefdinir
- cefepime
- cefiderocol
- cefixime
- cefotaxime
- cefotetan
- cefoxitin
- cefpodoxime
- cefprozil
- ceftaroline
- ceftazidime
- ceftobiprole
- ceftolozane
- ceftriaxone
- cefuroxime axetil
- cefuroxime sodium
- cephalexin
- dicloxacillin
- dihydroergotamine
- dulaglutide
- ergotamine
- fosphenytoin
- lactulose
- liraglutide
- methoxsalen
- methylergonovine
- nafcillin
- oxacillin
- penicillin G
- penicillin V
- pentobarbital
- phenobarbital
- phenytoin
- piperacillin
- pivmecillinam
- primidone
- quinine
- rifampin
- rifapentine
- sodium picosulfate
- tirzepatide
- verteporfin
Adverse Reactions .
Serious Reactions
- hypersensitivity reaction
- skin reaction, severe
- pericarditis
- autoimmune disorder
- hemolytic anemia
- thrombocytopenia
- neutropenia
- hepatotoxicity
- pancreatitis
- esophagitis (cap or tab form)
- esophageal ulcer (cap or tab form)
- pseudotumor cerebri
- C. difficile-associated diarrhea
- photosensitivity
Common Reactions
- nausea
- vomiting
- diarrhea
- vaginitis
- headache
- abdominal pain
- candidiasis, vulvovaginal
- photosensitivity
- skin hyperpigmentation
- tissue hyperpigmentation
- BUN elevated
- tooth discoloration, permanent (patients <8 yo)
- tooth discoloration, reversible (adult patients)
Safety/Monitoring .
Monitoring Parameters
BUN/Cr, CBC, LFTs if prolonged tx
Look/Sound-Alike Drug Names
doxycycline confused with: Declomycin; dicloxacillin; dicyclomine; doxazosin; doxepin; minocycline; tetracycline
Pregnancy/Lactation .
Pregnancy
Clinical Summary
may use during pregnancy for anthrax infection; weigh risk/benefit during pregnancy for malaria tx; otherwise, avoid use during pregnancy; inadequate human data available, though possible risk of spontaneous abortion; risk of permanent fetal teeth discoloration, abnormal bone development, and enamel hypoplasia based on human data w/ tetracycline class; possible risk of embryo-fetal toxicity based on conflicting animal data w/ tetracycline class
Lactation
Clinical Summary
Lyme Disease: avoid breastfeeding during tx and x5 days after D/C; no known risk of infant harm w/ short-term use based on limited human data and drug properties; theoretical risk of permanent infant teeth discoloration and abnormal bone development w/ prolonged use based on drug's mechanism of action; no human data available to assess effects on milk production
All Other Indications: avoid breastfeeding if >3wk tx duration, otherwise may use short-term while breastfeeding; no known risk of infant harm w/ short-term use based on limited human data and drug properties; theoretical risk of permanent infant teeth discoloration and abnormal bone development w/ prolonged use based on drug's mechanism of action; no human data available to assess effects on milk production
Pharmacology .
Metabolism: for doxycycline: liver minimally; CYP450: unknown
Excretion: for doxycycline: feces (primarily unchanged), urine 40% (primarily unchanged); Half-life: 18-22h
Subclass: Acne, Systemic Agents ; Anthrax ; Malaria ; Tetracyclines
Mechanism of Action
for doxycycline: binds to 30S and possibly 50S ribosomal subunit(s), inhibiting protein synthesis
Formulary .
No Formulary Selected
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