You should take Aquris Cef tablets (Cefixime 200 mg) only at the dose prescribed by your doctor, as it depends on the type and severity of the infection. Typically, adults are prescribed either 200 mg twice daily or 400 mg once daily, but this varies from patient to patient. Do not change the dose or frequency on your own, as incorrect use may affect treatment and lead to antibiotic resistance. If you are unsure about your prescription, please consult your doctor for advice.