Doxycycline, even in the Tet-On system, can cause side effects. Common reactions include nausea, vomiting, and diarrhea. These usually resolve with continued use, but inform your doctor if they persist or worsen. Sun sensitivity is another frequent side effect; protect your skin with sunscreen and limit sun exposure.
Gastrointestinal Issues
The antibiotic can disrupt your gut microbiome, leading to yeast infections (candidiasis). If you experience unusual vaginal discharge or oral thrush, seek medical advice.
Interactions with other medications
Doxycycline interacts with several drugs. Concurrent use with antacids, calcium supplements, or iron supplements reduces doxycycline absorption. Separate these medications by at least two hours. It also interacts with anticoagulants, potentially increasing bleeding risk. Discuss all medications, including over-the-counter drugs and supplements, with your physician before starting doxycycline.
Other potential issues
Rare but serious side effects include liver inflammation (hepatitis) and esophageal ulceration. Stop taking doxycycline and contact your doctor immediately if you experience severe abdominal pain, jaundice (yellowing of the skin or eyes), or difficulty swallowing. Allergic reactions, such as rash or hives, are possible; discontinue use and seek prompt medical attention if these occur.
