Always take the full course of medication prescribed for you. Call your doctor immediately if you notice any new or unusual symptoms. Don't share medications with anyone. Don't buy a medicine if the protective packaging is broken or looks as though it's been tampered with. Throw out leftover medicine if the package date shows it has expired.
Antibiotics can cause excessive levels of theophylline in the blood.
Symptoms include nausea, vomiting, palpitations and seizures. Mixing the alcohol and antibiotics can cause low blood pressure, vomiting, confusion and rapid heartbeat. The antibiotic may not be as effective if combined with iron, including iron supplements and iron-laden tonics. From dairy products and calcium found in antacids. The mixture leads to drastically reduced absorption of tetracycline or quinolones, lessening their effectiveness.