Treating infections caused by certain bacteria. It may also be used with other medicines to treat severe acne. It may also be used for other conditions as determined by your doctor.

Dynacin is a tetracycline antibiotic. It works by slowing the growth of certain bacteria and allowing the body’s immune system to destroy them.

Do NOT use Dynacin if:

  • you are allergic to any ingredient in Dynacin or to other tetracyclines (eg, doxycycline)
  • you are taking acitretin, isotretinoin, or a penicillin antibiotic (eg, amoxicillin)

Before using Dynacin:

Some medical conditions may interact with Dynacin. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

  • if you are pregnant, planning to become pregnant, or are breast-feeding
  • if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
  • if you have allergies to medicines, foods, or other substances
  • if you have asthma, kidney or liver problems, or an autoimmune disorder (eg, lupus)

Some MEDICINES MAY INTERACT with Dynacin. Tell your health care provider if you are taking any other medicines, especially any of the following:

Medicines that may harm the liver (eg, acetaminophen, methotrexate, ketoconazole, isoniazid, certain medicines for hiv infection) because the risk of liver side effects may be increased. Ask your doctor if you are unsure if any of your medicines might harm the liver

Acitretin or isotretinoin because the risk of increased pressure in the brain may be increased

Aluminum salts (eg, carbonate) or cimetidine because they may decrease Dynacin’s effectiveness

Anticoagulants (eg, warfarin) or ergot alkaloids (eg, ergotamine) because the risk of their side effects may be increased by Dynacin

Penicillin antibiotics(eg, amoxicillin) because their effectiveness may be decreased by Dynacin

This may not be a complete list of all interactions that may occur. Ask your health care provider if Dynacin may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

How to use Dynacin:

Use Dynacin as directed by your doctor. Check the label on the medicine for exact dosing instructions.

An extra patient leaflet is available with Dynacin. Talk to your pharmacist if you have questions about this information.

Take Dynacin by mouth with or without food.

Take Dynacin with a full glass of water (8 oz [240 mL]). Do not lie down for 30 minutes after taking Dynacin.

If you also take an antacid that has aluminum, calcium, or magnesium in it; bismuth salts (eg, bismuth subsalicylate); colestipol; iron salts (eg, iron sulfate); urinary alkalinizers (eg, sodium bicarbonate); vitamins or minerals; sucralfate; didanosine; quinapril; or zinc salts (eg, zinc sulfate), do not take them within 2 to 3 hours before or after taking Dynacin. Check with your doctor if you have questions.

To clear up your infection completely, take Dynacin for the full course of treatment. Keep taking it even if you feel better in a few days.

Dynacin works best if it is taken at the same time each day.

If you miss a dose of Dynacin, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Ask your health care provider any questions you may have about how to use Dynacin.

Important safety information:

Tell your doctor or dentist that you take Dynacin before you receive any medical or dental care, emergency care, or surgery.

Dynacin may cause dizziness, light-headedness, or blurred vision. These effects may be worse if you take it with alcohol or certain medicines. Use Dynacin with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.

Long-term or repeated use of Dynacin may cause a second infection. Tell your doctor if signs of a second infection occur. Your medicine may need to be changed to treat this.

Dynacin may cause you to become sunburned more easily. Avoid the sun, sunlamps, or tanning booths until you know how you react to Dynacin. Use a sunscreen or wear protective clothing if you must be outside for more than a short time.

Dynacin only works against bacteria; it does not treat viral infections (eg, the common cold).

Mild diarrhea is common with antibiotic use. However, a more serious form of diarrhea (pseudomembranous colitis) may rarely occur. This may develop while you use the antibiotic or within several months after you stop using it. Contact your doctor right away if stomach pain or cramps, severe diarrhea, or bloody stools occur. Do not treat diarrhea without first checking with your doctor.

A very bad and sometimes deadly reaction has happened with Dynacin. Most of the time, this reaction has signs like fever, rash, or swollen glands with problems in body organs like the liver, kidney, blood, heart, muscles and joints, or lungs. Discuss any questions or concerns with your doctor.

Raised pressure in the brain has happened with Dynacin. Most of the time, this problem will go back to normal after Dynacin is stopped. Sometimes, vision loss may happen and may not go away even after Dynacin is stopped. Call your doctor right away if you have a headache or vision problems (eg, blurred vision, double vision, vision loss).

Be sure to use Dynacin for the full course of treatment. If you do not, the medicine may not clear up your infection completely. The bacteria could also become less sensitive to this or other medicines. This could make the infection harder to treat in the future.

Hormonal birth control (eg, birth control pills) may not work as well while you are using Dynacin. To prevent pregnancy, use an extra form of birth control (eg, condoms).

Dynacin may interfere with certain lab tests. Be sure your doctor and lab personnel know you are using Dynacin.

Lab tests may be performed while you use Dynacin. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.

Dynacin should not be used in CHILDREN younger than 8 years old unless other medicines cannot be used or have not worked. Using Dynacin in CHILDREN younger than 8 years old or in women during the last half of pregnancy may cause a permanent change in the tooth coloring of the child. Discuss any questions or concerns with the doctor.

PREGNANCY and BREAST-FEEDING: Dynacin may cause harm to the fetus. If you think you may be pregnant, contact your doctor. You will need to discuss the benefits and risks of using Dynacin while you are pregnant. Dynacin is found in breast milk. Do not breast-feed while taking Dynacin.

Major Side Effects

You should check with your doctor immediately if any of these side effects occur when taking minocycline:

  • Incidence not known:
  • Black, tarry stools
  • blistering, peeling, or loosening of the skin
  • blood in the urine or stools
  • blurred or double vision
  • bulging soft spot on the head of an infant
  • chest pain, possibly moving to the left arm, neck, or shoulder
  • confusion
  • diarrhea
  • dizziness or lightheadedness
  • eye pain
  • fast heartbeat
  • general feeling of discomfort or illness
  • general tiredness and weakness

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