Clarithromycin extended-release tablets can cause dizziness in some patients, which is also a central nervous system side effect, and can also manifest as anxiety, insomnia, nightmares, tinnitus, and even hallucinations and disorientation. Most of the side effects are relatively mild and patients can get better on their own. Clarithromycin extended-release tablets are mainly used for the treatment of bronchitis and pneumonia caused by Gram-positive bacteria, anaerobic bacteria, and pathogenic infections such as mycoplasma and chlamydia, and the side effects of this drug are relatively few. If the side effects are more obvious, it is recommended that you can switch to other drugs, especially for mycoplasma and chlamydia infections, you can choose azithromycin, levofloxacin or erythromycin to treat them.