doxycycline (as hydrochloride)
Consumer Medicine Information
What is in this leaflet?
This leaflet answers some common questions about DOXYLIN. It does not contain all
the available information. It does not take the place of talking to your doctor or
All medicines have risks and benefits. Your doctor has weighed the risks of you taking
DOXYLIN against the benefits they expect it will have for you.
If you have any concerns about taking this medicine, talk to your doctor or pharmacist.
Keep this leaflet with your medicine.
You may need to read it again.
What DOXYLIN is used for
DOXYLIN is an antibiotic used to:
treat certain infections caused by bacteria
prevent certain types of malaria
This medicine belongs to a group of medicines called tetracyclines. It works by killing
or stopping the growth of bacteria, which cause infections or make acne worse.
DOXYLIN also works against parasites that cause malaria. It is sometimes used in
combination with other anti-malarial medicines.
Tetracyclines will not work against infections caused by viruses, such as colds or
Ask your doctor if you have any questions about why this medicine has been prescribed
Your doctor may have prescribed it for another reason.
This medicine is not addictive.
This medicine is available only with a doctor's prescription.
Before you take DOXYLIN
When you must not take it
Do not take DOXYLIN if you have an allergy to:
any medicine containing doxycycline
any medicines containing other tetracyclines
any of the ingredients listed at the end of this leaflet
Some of the symptoms of an allergic reaction may include:
shortness of breath
wheezing or difficulty breathing
swelling of the face, lips, tongue or other parts of the body
rash, itching or hives on the skin
Do not take this medicine if you are taking other medicines containing vitamin A,
isotretinoin or etretinate.
DOXYLIN should not be taken during periods of tooth development (more than 18 weeks
into pregnancy or in children 8 years and under).
DOXYLIN, like other tetracyclines, may cause enamel loss and permanent discolouration
(yellow-grey-brown) in developing teeth.
Do not take this medicine after the expiry date printed on the pack or if the packaging
is torn or show signs of tampering.
If it has expired or is damaged, return it to your pharmacist for disposal.
If you are not sure whether you should start taking this medicine, talk to your doctor.
Before you start to take it
Tell your doctor if you have allergies to any other medicines, foods, preservatives
Tell your doctor if you are pregnant or plan to become pregnant.
DOXYLIN is not recommended during the last half of pregnancy.
High doses of tetracyclines may also cause liver problems in pregnant women.
Your doctor can discuss with you the risks and benefits involved.
Tell your doctor if you are breastfeeding or plan to breastfeed.
The active ingredient in DOXYLIN passes into breast milk and there is a possibility
that your baby may be affected.
Your doctor can discuss with you the risks and benefits involved.
Tell your doctor if you are scheduled to have surgery under general anaesthetic.
Tell your doctor if you work outdoors or if you are likely to be exposed to strong
sunlight or ultra-violet light (e.g. on a sun bed).
You should avoid exposure to strong sunlight while taking this medicine as your skin
may be more sensitive to sunburn than normal.
If you have not told your doctor about any of the above, tell them before you start
Taking other medicines
Tell your doctor or pharmacist if you are taking any other medicines, including any
that you get without a prescription from your pharmacy, supermarket or health food
Some medicines and DOXYLIN may interfere with each other. These include:
preparations containing vitamin A, including vitamin supplements
preparations containing calcium or iron, including vitamin supplements
antacids, medicines used for indigestion
some medicines used for skin problems such as isotretinoin or etretinate
warfarin, a medicine used to prevent blood clots
another group of antibiotics called penicillins
phenytoin or carbamazepine, anticonvulsant medicines that are used to treat seizures
barbiturates, such as phenobarbital (phenobarbitone)
methoxyflurane, an anaesthetic
acetazolamide, a medicine used to help the body rid of salt and water
the contraceptive pill (birth control pill)
DOXYLIN may decrease the effectiveness of some birth control pills.
Your doctor may advise you to use an additional method of contraception while you
are taking DOXYLIN and for 7 days after taking DOXYLIN
These medicines may be affected by DOXYLIN or may affect how well it works. You may
need different amounts of your medicines, or you may need to take different medicines.
Alcohol may also interfere with the absorption of DOXYLIN.
Your doctor and pharmacist have more information on medicines to be careful with or
avoid while taking this medicine.
How to take DOXYLIN
Follow all directions given to you by your doctor or pharmacist carefully.
They may differ from the information contained in this leaflet.
If you do not understand the instructions on the box/bottle, ask your doctor or pharmacist
How much to take
Your doctor will tell you how much you need to take each day and when to take it.
This depends on your condition and whether or not you are taking any other medicines.
For treating infections, the usual dose of doxycycline for adults is 200 mg on the
first day, followed by 100 mg each day from then on.
For controlling acne, the usual dose for adults is 50 mg a day.
For the prevention of malaria, the usual dose for adults is 100 mg each day, starting
two days before entering the malarious area, continuing during the visit, and for
four weeks after leaving the area.
Children over 8 years of age may need smaller doses, depending on their weight.
How to take it
Swallow the tablets whole with a full glass of water or milk while sitting or standing
If you are taking iron or calcium medicines (including vitamins that contain iron
or calcium) or antacids, you must take them at least two hours before or two hours
after taking DOXYLIN to make sure there are no problems with absorption.
Do not lie down immediately after taking DOXYLIN.
It is important to not lie down for at least half an hour after swallowing your medicine,
so that the tablet can move swiftly into the stomach and prevent irritation of the
throat or oesophagus (canal taking food from the mouth to the stomach).
When to take it
Take your medicine during or immediately after a meal, preferably in the morning.
This will reduce the chances of stomach upset.
Take your medicine at about the same time each day.
Taking it at the same time each day will have the best effect. It will also help you
remember when to take it.
How long to take it
Keep taking DOXYLIN for the full length of treatment. Continue taking your medicine
even if you begin to feel better after a few days.
If you stop taking your medicine too soon, your infection may not clear completely,
or your symptoms may return.
For treating infections, DOXYLIN is usually taken for one to two weeks.
For controlling acne, DOXYLIN is normally taken over a period of 12 weeks.
For preventing malaria, DOXYLIN is recommended to be taken for up to a maximum of
8 weeks. However, your doctor may prescribe DOXYLIN for longer periods.
If you forget to take it
If it is almost time for your next dose, skip the dose you missed and take your next
dose when you are meant to.
Otherwise, take it as soon as you remember, and then go back to taking your medicine
as you would normally.
Do not take a double dose to make up for the dose you missed.
This may increase the chance of you getting an unwanted side effect.
If you are not sure what to do, ask your doctor or pharmacist.
If you have trouble remembering to take your medicine, ask your pharmacist for some
If you take too much (overdose)
Immediately telephone your doctor or the Poisons Information Centre (telephone 13
11 26) for advice, or go to Accident and Emergency at the nearest hospital, if you
think you or anyone else may have taken too much DOXYLIN. Do this even if there are
no signs of discomfort or poisoning.
You may need urgent medical attention.
Symptoms of overdose include nausea and vomiting.
While you are taking DOXYLIN
Things you must do
If you are about to be started on any new medicine, remind your doctor and pharmacist
that you are taking DOXYLIN.
Tell any other doctors, dentists and pharmacists who treat you that you are taking
If you become pregnant while taking this medicine, tell your doctor immediately.
If you are taking DOXYLIN for an infection and your symptoms do not improve within
a few days, or if they become worse, tell your doctor.
If you get severe diarrhoea, tell your doctor or pharmacist immediately. Do this
even if it occurs several weeks after you have stopped taking DOXYLIN.
Diarrhoea may mean that you have a serious condition affecting your bowel. You may
need urgent medical care. Do not take any medicines for diarrhoea without checking
with your doctor or pharmacist.
If you are about to have any blood tests, tell your doctor that you are taking this
It may interfere with the results of some tests.
Keep all of your doctor's appointments so that your progress can be checked.
Your doctor may do some tests from time to time to make sure the medicine is working
and to prevent unwanted side effects.
Things you must not do
Do not take DOXYLIN to treat any other complaints unless your doctor tells you to.
Do not give your medicine to anyone else, even if they have the same condition as
Do not stop taking your medicine or lower the dosage without checking with your doctor.
If you do not complete the full course prescribed by your doctor, all the bacteria
causing your infection may not be killed. These bacteria may continue to grow and
multiply so that your infection may not clear completely or may return.
Things to be careful of
Protect your skin when you are in the sun, especially between 10am and 3pm. If outdoors,
wear protective clothing and use a SPF 30+ sunscreen.
DOXYLIN may cause your skin to be more sensitive to sunlight than normal. Exposure
to sunlight may cause a skin rash, itching, redness, or severe sunburn.
If your skin does appear to be burning, tell your doctor before you take your next
dose of DOXYLIN.
If you get thrush (a fungal infection which can affect the mouth and/or vagina) or
any other infection while taking or soon after stopping DOXYLIN, tell your doctor.
Sometimes use of this medicine allows fungi to grow. These fungi are not killed by
Tell your doctor or pharmacist as soon as possible if you do not feel well while you
are taking DOXYLIN.
This medicine helps most people, but it may have unwanted side effects in a few people.
Sometimes they are serious, most of the time they are not. You may need medical treatment
if you get some of the side effects.
Do not be alarmed by the following lists of side effects. You may not experience any
Ask your doctor or pharmacist to answer any questions you may have.
Tell your doctor or pharmacist if you notice any of the following and they worry you:
feeling sick, vomiting, diarrhoea
stomach upset or vomiting
oral thrush (white, furry sore tongue and mouth)
vaginal thrush (sore and itchy vagina, vaginal discharge)
rash or itching
persistent ringing or noise in the ears
The above side effects are usually mild.
If any of the following happen, tell your doctor immediately or go to Accident and
Emergency at your nearest hospital:
heartburn or indigestion, which may be due to irritation of the oesophagus (food pipe)
severe diarrhoea, usually with blood and mucus, stomach pain and fever
bleeding or bruising more easily than normal
fast heart rate
severe blisters and bleeding in the lips, eyes, mouth, nose and genitals
signs of liver disease such as feeling generally unwell, fever, itching, yellowing
of the skin and/or eyes, and dark coloured urine
passing little or no urine
joint pain, muscle tenderness or weakness
pain or difficulty in swallowing
severe sunburn that occurs more quickly than normal
severe skin reactions starting as painful red areas then large blisters and ends with
peeling of layers of skin
signs of an allergic reaction such as skin rash, itching or hives; shortness of breath,
wheezing or trouble breathing; swelling of the face, lips, tongue or other parts of
The above list includes serious side effects that may require medical attention. Serious
side effects are rare.
Tell your doctor or pharmacist if you notice anything that is making you feel unwell.
Other side effects not listed above may also occur in some people.
After finishing DOXYLIN
See your doctor immediately if you notice any of the following, particularly if they
occur several weeks after stopping treatment with DOXYLIN:
watery and severe diarrhoea, which may also be bloody
severe stomach cramps
fever in combination with one or both of the above
DOXYLIN can cause some bacteria that are normally harmless and present in the bowel
to multiply and cause the above symptoms.
You may have a serious condition affecting your bowels. Therefore, it is important
to tell your doctor as you may need urgent medical attention.
Do not take any medicine for diarrhoea without first checking with your doctor.
After taking DOXYLIN
Keep your tablets in the pack or bottle until it is time to take them.
If you take the tablets out of the pack or bottle they may not keep well.
Keep your tablets in a cool dry place where the temperature stays below 30°C.
Do not store DOXYLIN or any other medicine in the bathroom or near a sink. Do not
leave it in the car or on a window sill.
Heat and dampness can destroy some medicines.
Keep it where children cannot reach it.
A locked cupboard at least one-and-a-half metres above the ground is a good place
to store medicines.
If your doctor tells you to stop taking this medicine or the expiry date has passed,
ask your pharmacist what to do with any medicine that is left over.
What it looks like
DOXYLIN is available in two strengths:
50 mg - round, yellow tablet marked "DE" over "50" one side and "G" on the reverse
100 mg - round, yellow tablet marked "DE" over "100" one side and "G" on the reverse
DOXYLIN 50 mg is available in bottles of 25 tablets.
DOXYLIN 100 mg is available in blister packs of 7 and 21 tablets.
DOXYLIN contains either 50 mg or 100 mg of doxycycline (as hydrochloride) as the active
The tablets also contain the following inactive ingredients:
pregelatinised maize starch
colloidal anhydrous silica
quinoline yellow CI47005
sunset yellow FCF CI15985
indigo carmine CI73015
DOXYLIN contains soya bean products and sulfites. This medicine does not contain gluten.
DOXYLIN is made in Australia by:
Alphapharm Pty Limited
Level 1, 30 The Bond
30-34 Hickson Road
Millers Point NSW 2000
Australian registration numbers:
Doxylin 50 - AUST R 63512
Doxylin 100 - AUST R 63509
This leaflet was prepared in