Lyme Antibiotic Course: What to Log While Taking Doxycycline

Updated 29 Oct 2026

The NHS says the antibiotics you are given for Lyme disease will depend on your symptoms (NHS Lyme disease guidance). Doxycycline is one antibiotic the NHS describes in detail, and if it is the one you were prescribed, a few weeks of daily doses is a lot to keep track of.

This guide covers what to log during the course: doses and timing, missed doses, side effects, sun sensitivity, other medicines, and how your Lyme symptoms change. Your prescriber decides the medicine and the length of the course.

What to log about the course itself

The NHS says that if a GP thinks you might have Lyme disease, they will prescribe a course of antibiotics, that treatment is more effective if it is started as soon as possible, and that you may need to take them for up to 28 days (NHS Lyme disease guidance). It says it is important to finish the course, even if you start to feel better (NHS Lyme disease guidance).

For doxycycline, the NHS says how much you need to take and for how long depends on why you are taking it, and to always check the packet or leaflet that comes with your medicine (NHS doxycycline guidance).

At the start, write down the medicine name, the dose, how many times a day, the start date, and the planned end date. Each day, tick each dose with the time you took it. At the end, the log shows the whole course was finished, which is the first thing a clinician will ask about.

For the first weeks, see the first weeks after a Lyme diagnosis.

In Lyme Journey, My Meds keeps the course with its start date and doses.

What to log about how you take it

The NHS advises trying to take doxycycline at the same time each day, and if you take it twice a day, this could be once in the morning and once in the evening (NHS doxycycline guidance). It says to swallow tablets or capsules whole with a glass of water while sitting or standing up, and to avoid lying down for at least 30 minutes after taking it, which helps stop the medicine irritating your throat (NHS doxycycline guidance).

It says to check your packet or leaflet to see whether you should take it with food or not, that you can eat as normal while taking it, and that it is best not to drink alcohol because it can stop the medicine working properly (NHS doxycycline guidance).

Log the time of each dose, whether you had water with it, and whether you stayed upright afterward. If your throat felt sore after a dose, note it, since that is a detail to raise with the pharmacist.

In Lyme Journey, the Daily check-in keeps each day's doses beside how you felt.

What to log about missed doses

The NHS says that if you forget to take a dose of doxycycline, take it as soon as you remember, unless it is nearly time for your next dose (NHS doxycycline guidance). If it is nearly time for your next dose, skip the dose you missed and take your next dose at the usual time, and do not take 2 doses to make up for a missed dose (NHS doxycycline guidance).

It says taking an extra dose is unlikely to cause problems, but it is important to get medical advice if you take too much, and to get help from NHS 111 if you have taken more than your prescribed dose (NHS doxycycline guidance).

Write down every missed or late dose with the date, the time you noticed, and what you did. Over a few weeks, a pattern can show up, such as evening doses missed on busy days, and that tells you which time to set a reminder for.

In Lyme Journey, the Daily Journal keeps a note of each missed dose in your own words.

What to log about side effects

The NHS lists common side effects of doxycycline as headaches, feeling sick (nausea) and being sick (vomiting), and a rash (NHS doxycycline guidance). It advises speaking to a pharmacist or doctor if you have side effects that bother you or do not go away, and to keep taking your medicine unless you are advised to stop (NHS doxycycline guidance).

It lists possible serious side effects, including an allergic reaction (anaphylaxis) with a swollen throat or tongue, a raised, itchy rash, and difficulty breathing; your skin being more sensitive to the sun, with a rash, itching, and redness; inflammation in the bowel, with a stomach ache and bloody diarrhea; and changes in your blood cells, with tiredness, bruising easily, or getting ill a lot (NHS doxycycline guidance). It says to call NHS 111 if you think you might be having serious side effects (NHS doxycycline guidance).

Log any side effect with the date, the time after a dose, and how long it lasted. A rash during the course is worth photographing and dating, so the clinician can see it even after it fades.

For reactions during treatment, see what to note in reaction weeks during treatment.

In Lyme Journey, the Doctor Report brings side effect dates to the conversation.

What to log about other medicines

The NHS says some medicines, remedies, and supplements may not mix well with doxycycline, including some types of anticoagulants (such as warfarin), antacids and other indigestion treatments, acne medicines, and medicines or supplements that contain iron or zinc (NHS doxycycline guidance). It says to tell your doctor before taking doxycycline if you are taking any other medicines, herbal remedies, vitamins, or supplements (NHS doxycycline guidance).

It also says doxycycline may not be suitable for some people, for example if you have had an allergic reaction to doxycycline or another antibiotic, have a liver or kidney condition, or have lupus or myasthenia gravis, and to tell your doctor about any medical conditions before you start (NHS doxycycline guidance).

Keep a full list of everything you take, including indigestion remedies and supplements bought without a prescription, with the time you usually take each one. Bring the list to the pharmacist, so they can check the timing with you.

In Lyme Journey, My Meds keeps each medicine and supplement in one list.

What to log about Lyme symptoms during and after the course

The NHS says most people with Lyme disease get better after antibiotic treatment, that this can take months for some people, and that the symptoms should improve over time (NHS Lyme disease guidance). It says a few people continue to have symptoms, like tiredness, aches, and loss of energy, that can last for years (NHS Lyme disease guidance).

It advises speaking to a doctor if your symptoms come back, or do not improve, after treatment with antibiotics, and says that if symptoms last a long time after treatment you may be referred to a specialist in hospital for advice and more blood tests (NHS Lyme disease guidance).

Each day of the course, note your main Lyme symptoms, such as tiredness, aches, or a rash, on a simple scale. Keep logging for a few weeks after the last dose. The log then shows the doctor whether symptoms improved, came back, or stayed the same, with dates.

For tiring days, see what to log on Lyme fatigue crash days.

In Lyme Journey, the Flare Tracker marks days when symptoms get worse.

How Lyme Journey can help

A notebook can hold one bad day. The harder part is keeping doses, missed doses, side effects, other medicines, and symptoms in one dated record.

Lyme Journey is a personal Lyme disease tracker from Health Journey Labs on the App Store and Google Play. It records symptoms, medicines, test dates, and visits in one dated history. Below is what you can use and how each part helps:

• Daily check-in — A short guided pass across symptoms, mood, nutrition, sleep, exercise, meds, and external factors, including fatigue, joint pain, and brain fog, so links you would not remember on your own show up side by side.
• Daily Journal — Freer notes, including voice when typing is too much, such as rash changes, which photos you took, and visit debriefs, that add detail a score alone cannot show.
• Flare Tracker — Mark a day clearly worse than usual, so you can tell a one-off bad day from a repeating pattern.
• My Meds — Antibiotics and other medicines with timing, so you can line up start and end dates with symptom days.
• My Labs — Result dates for blood tests, heart checks, and other tests, so each result sits next to how you felt that month.
• Weekly Goals — Set one small aim, such as a regular bedtime or a paced walk, and see whether it held and whether symptoms changed.
• Learn — Short education topics on Lyme themes such as joints, fatigue, sleep, and visit preparation.
• AI companions — Clara and specialist companions already see your logged history, which helps with visit wording.
• My Care Team — A profile for each clinician, plus upcoming appointments and notes for each visit, used before, during, and after appointments.
• Doctor Report — Two views: the Appointment Planning Report helps you prepare what to ask, and Generate Report, opened from a saved doctor, builds a dated summary of your recent progress for that doctor.
• My Assessments — Structured check-ins that add context about you across weeks.
• Food Tracker — Meal and drink lines, so you can line up meals and appetite with energy.
• Period Tracker — Cycle dates, so you can see whether pain or fatigue days cluster at a certain point in the cycle.
• Weight Tracker — Weekly weights, useful when appetite or activity is changing.

Everything you log builds one history. Guided forms include the key questions, and you can add custom symptoms when you need your own labels. Lyme Journey is free to download.

Sources

• NHS — Lyme disease
• NHS — Doxycycline

FAQ