There is no clear data on how long you can take doxycycline after stopping isotretinoin, so it is recommended that you change your medication according to your doctor’s instructions.
Doxycycline is a tetracycline and isotretinoin is a retinoid. When isotretinoin is used in combination with doxycycline, symptoms of “pseudotumor cerebri” may occur, which may be accompanied by benign elevation of cerebral pressure, manifested as vertigo, visual disturbances, and high blood pressure with headache. Therefore, isotretinoin should not be combined with tetracyclines as much as possible during the use of isotretinoin.
However, there is no clear data on the interval between isotretinoin use and doxycycline use after discontinuing isotretinoin, and it varies from person to person. It is recommended to follow the doctor’s instructions, and to go to the hospital for examination in time if symptoms similar to those mentioned above occur.