is a broad-spectrum tetracycline antibiotic used against a wide
variety of bacterial infections, including Rocky Mountain spotted
fever and other fevers caused by ticks, fleas, and lice; urinary
tract infections; trachoma (chronic infections of the eye); and some
gonococcal infections in adults. Doxycycline is an approved
treatment for inhalational anthrax. Doxycycline is also used with
other medications to treat severe acne and amoebic dysentery
(diarrhea caused by severe parasitic infection of the intestines).
may also be taken for the prevention of malaria on foreign trips of
less than 4 months' duration.
doctors prescribe doxycycline to treat early Lyme disease and to
prevent "traveler's diarrhea." These are not yet officially approved
uses for doxycycline.
100 mg, brand name Doxyclat, is manufactured by Pierre Fabre Ibérica
and comes in multiples of 56 tablets.
side effects cannot be anticipated. If any develop or change in
intensity, inform your doctor as soon as possible. Only your doctor
can determine if it is safe for you to continue taking doxycycline.
common doxycycline side effects may include:
Angioedema (chest pain; swelling of face, around lips, tongue
and throat, arms and legs; difficulty swallowing), bulging foreheads
in infants, diarrhea, difficulty swallowing, discolored teeth in
infants and children (more common during long-term use of
tetracycline), inflammation of the tongue, loss of appetite, nausea,
rash, rectal or genital itching, severe allergic reaction (hives,
itching, and swelling), skin sensitivity to light, vomiting.
or rare doxycycline side effects may include:Aggravation of lupus erythematosus (disease of the connective
tissue), skin inflammation and peeling, throat inflammation and
Cautions: If you are
sensitive to or have ever had an allergic reaction to doxycycline or
drugs of this type, you should not take this medication. Make sure
your doctor is aware of any drug reactions that you have experienced.
other antibiotics, treatment with doxycycline may result in a growth
of bacteria that do not respond to this medication and can cause a
secondary infection. An overgrowth of certain bacteria in the colon
could cause mild to severe--and rarely, life-threatening--diarrhea.
If you develop this symptom, call your doctor immediately.
foreheads in infants and headaches in adults have occurred. These
symptoms disappeared when doxycycline was discontinued.
become more sensitive to sunlight while taking doxycycline. Be
careful if you are going out in the sun or using a sunlamp. If you
develop a skin rash, notify your doctor immediately.
control pills that contain estrogen may not be as effective while
you are taking tetracycline drugs. Ask your doctor if you should use
another form of birth control while taking doxycycline.
doxycycline is taken with certain other drugs, the effects of either
could be increased, decreased, or altered. It is especially
important to check with your doctor before combining doxycycline
with the following:
Antacids containing aluminum, calcium, or magnesium, and
iron-containing preparations such as Maalox, Mylanta, and others
Barbiturates such as phenobarbital
Blood-thinning medications such as Coumadin
Penicillin (V-Cillin K, Pen-vee K, others)
adult dose of oral doxycycline is 200 mg on the first day of
treatment (100 mg every 12 hours) followed by a maintenance dose of
100 mg per day. The maintenance dose may be taken as a single dose
or as 50 mg every 12 hours.
may prescribe 100 mg every 12 hours for severe infections such as
chronic urinary tract infection.
above 8 years of age, the recommended dosage schedule for those
weighing 100 pounds (45 kg) or less is 2 mg per pound (1 kg) of body
weight, divided into 2 doses, on the first day of treatment,
followed by 1 mg per pound (0.5 kg) of body weight given as a single
daily dose or divided into 2 doses on subsequent days.
severe infections, up to 2 mg per pound (0.5 kg) of body weight may
For Uncomplicated Gonorrhea (Except Anorectal Infections in adult
- The usual
dose is 100 mg by mouth, twice a day for 7 days. An alternate,
single-day treatment is 300 mg, followed in 1 hour by a second
and Secondary Syphilis:
- The usual adult dose is 200 mg a day, divided into smaller,
equal doses for 14 days.
- To prevent
or combat infection after exposure, the usual dose is 100 mg taken
by mouth twice a day for 60 days. Treatment can be started
intravenously, but should be switched to oral doses as soon as
inhalational anthrax in children weighing less than 100 pounds (45
kg), the usual dose is 1 mg per pound of body weight twice daily for
For prevention of malaria:
- The recommended adult dose is 100 mg doxycycline a day.
Treatment should begin 1 to 2 days before travel to the area
where malaria is found, then continue daily during travel in the
area and 4 weeks after leaving.
- For children the recommended dose for prevention of malaria
is 2 mg per 2.2 pounds (1 kg) of body weight up to 100 mg:
- For children
over 100 pounds (45 kg), the usual adult dose should be used.
medication taken in excess can have serious consequences. If you
suspect an overdose of doxycycline, seek medical treatment
Doxycycline comes as a tablet to take by mouth.
doxycycline with a full glass of water or other liquid to
avoid irritating your throat or stomach. Doxycycline can be
taken with or without food. However, if the medicine does
upset your stomach, you may wish to take the doxycycline
with a glass of milk or after you have eaten. Doxycycline
tablets should be swallowed whole.
doxycycline exactly as prescribed by your doctor, even if your
symptoms have disappeared.
If you miss
a dose of doxycycline, take the forgotten dose as soon as you
remember. If it is almost time for the next dose, put it off for
several hours after taking the missed dose. Specifically, if you are
taking one dose a day, take the next one 10 to 12 hours after the
missed dose. If you are taking two doses a day, take the next one 5
to 6 hours after the missed dose. If you are taking three doses a
day, take the next one 2 to 4 hours after the missed dose. Then
return to your regular schedule.
Store doxycycline away from direct light and heat.
Store in a dry location; avoid storing doxycycline in the bathroom, near
sinks, or other areas where it may become damp. Do not use
doxycycline after the expiration date. Keep doxycycline
away from children; both when storing it, and when discarding any
should not be used during pregnancy. Tetracycline can damage
developing teeth during the last half of pregnancy. If you are
pregnant or plan to become pregnant, inform your doctor immediately.
Tetracyclines such as doxycycline appear in breast milk and can
affect a nursing infant. If doxycycline is essential to your health,
your doctor may advise you to discontinue breastfeeding until your
treatment is finished.
children under 8 years old should not take doxycycline. It may
cause developing teeth to become permanently discolored. (However,
children under 8 may be given doxycycline for inhalational anthrax).
No specific recommendations are
This document is provided for information only. It is not a substitute
for consultation with a physician, either to diagnose symptoms
or prescribe treatment. Any dosages mentioned are general
guidelines only, please follow the directions of your doctor exactly when taking
doxycycline. We have made
every effort to ensure that this information is accurate,
but only your doctor can say if doxycycline, or a drug combination,
is safe for you. It should not be construed to indicate that
to order and use doxycycline is safe, appropriate, or effective
for you. Consult your healthcare professional before you
order Doxycycline online.