Do not use Tetracycline if:

• you are allergic to any ingredient in Tetracycline or other tetracycline antibiotics (e.g., doxycycline);
• you are taking acitretin or methoxyflurane.

• Tetracycline may cause dizziness or blurred vision. These effects may be worse if you take it with alcohol or certain medicines. Use Tetracycline with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to 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.
• Be sure to use Tetracycline 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.
• Tetracycline may cause you to become sunburned more easily. Avoid the sun, sunlamps, or tanning booths until you know how you react to Tetracycline. Use a sunscreen or wear protective clothing if you must be outside for more than a short time.
• Do not use after expiration date. Outdated medicine is highly toxic to the kidneys.
• Long-term or repeated use of Tetracycline 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.
• Hormonal birth control (e.g., birth control pills) may not work as well while you are using Tetracycline . To prevent pregnancy, use an extra form of birth control (e.g., condoms).
• Lab tests may be performed while you use Tetracycline. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.
• Use of Tetracycline in children may cause permanent discoloring of the teeth.
• Tetracycline should be used with extreme caution in children younger than 8 years old; safety and effectiveness in these children have not been confirmed.
• Pregnancy and breast-feeding: Tetracycline has been shown to 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 Tetracycline while you are pregnant. Tetracycline is found in breast milk. Do not breast-feed while taking Tetracycline.

Check with your doctor if any of these most common side effects persist or become bothersome:

• black hairy tongue; blurred vision; bulky loose stools; diarrhea; difficulty swallowing; fever; headache; hives; hoarseness; indigestion; inflammation or redness of tongue; joint pain; loss of appetite; mouth sores; nausea; rash; sensitivity to sunlight; sore throat; stomach pain; swelling and itching of the rectum.

• severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); infection (fever, chills, sore throat); itching; nausea; severe skin reaction to the sun; vaginal irritation or discharge; vomiting.

If you have any questions about Tetracycline, please talk with your doctor, pharmacist, or other health care provider.
Tetracycline is to be used only by the patient for whom it is prescribed. Do not share it with other people.