Treatment for Bullseye Rash After Tick Bite

First-Line Treatment Algorithm

The Infectious Diseases Society of America recommends doxycycline 100 mg orally twice daily for 10 days as the preferred agent with the strongest evidence base for patients aged 8 years and older, and for children aged 8 years and older, doxycycline 4 mg/kg per day in 2 divided doses (maximum 100 mg per dose) 1
For pregnant women, children under 8 years, or patients with a doxycycline allergy, the Infectious Diseases Society of America recommends amoxicillin 500 mg orally three times daily for 14 days, with standard pediatric dosing applying to children 1
The Infectious Diseases Society of America suggests cefuroxime axetil 500 mg orally twice daily for 14 days as an alternative beta-lactam option for patients who cannot tolerate doxycycline and amoxicillin 1

For patients who cannot take doxycycline and beta-lactams, the Infectious Diseases Society of America recommends azithromycin 500 mg orally daily for 7-10 days, with close monitoring required to ensure clinical resolution 1
The Infectious Diseases Society of America recommends macrolide dosing for pediatric patients as follows: azithromycin 10 mg/kg per day (maximum 500 mg/day), clarithromycin 7.5 mg/kg twice daily (maximum 500 mg per dose), and erythromycin 12.5 mg/kg four times daily (maximum 500 mg per dose) 1

The Infectious Diseases Society of America advises against using amoxicillin for prophylaxis in patients who cannot take doxycycline after a tick bite without rash, as there is no evidence for effective short-course prophylactic regimens 1
The Infectious Diseases Society of America recommends against extending treatment duration beyond recommended periods without clear indication, as there is no evidence that longer therapy improves outcomes for early Lyme disease 1
The Infectious Diseases Society of America advises against substituting macrolides as first-line therapy, as they have proven inferior efficacy compared to doxycycline, amoxicillin, and cefuroxime 1

The Infectious Diseases Society of America recommends monitoring patients for resolution of the rash and associated symptoms after treatment 1
The Infectious Diseases Society of America suggests reassessing patients for alternative diagnoses or complications if symptoms persist or worsen despite appropriate antibiotic therapy 1

Erythema migrans (bullseye rash) is pathognomonic for Lyme disease in patients with potential tick exposure in endemic areas 2
Clinical diagnosis is recommended rather than laboratory testing for typical erythema migrans 3, 2

Doxycycline is recommended at a dose of 100 mg twice daily for 10 days for the treatment of Lyme disease 3, 2
Amoxicillin is recommended at a dose of 500 mg three or four times daily for 14 days for the treatment of Lyme disease 2
Cefuroxime axetil is recommended at a dose of 500 mg twice daily for 14 days for the treatment of Lyme disease 2

For pregnant women, children under 8 years, or those who cannot take doxycycline, Amoxicillin is the preferred alternative 4
Azithromycin can be used for 5-10 days, preferably 7 days, if patients cannot take both doxycycline and beta-lactams 2

The American College of Rheumatology recommends using EPA-registered repellents (DEET, picaridin, IR3535, oil of lemon eucalyptus) to prevent future tick bites 3
The Infectious Diseases Society of America recommends wearing protective clothing to prevent future tick bites, as stated in the Clinical Infectious Diseases journal 4 is not available, using 3 instead
The Centers for Disease Control and Prevention recommends performing daily tick checks to prevent future tick bites, as stated in the Arthritis and Rheumatology journal 3
The American Academy of Pediatrics recommends removing ticks promptly using fine-tipped tweezers to prevent future tick bites, as stated in the Arthritis and Rheumatology journal 3

In certain geographic regions, Southern tick-associated rash illness (STARI) may present similarly to Lyme disease, according to the Arthritis Care & Research journal 2
When STARI cannot be distinguished from Lyme disease in areas endemic for both conditions, treatment for Lyme disease is indicated, as stated in the Arthritis and Rheumatology journal 5