Derfor bruges doxycyclin i klinikken ofte off- label til langvarig behandling (måneder op til flere år) af acne vulgaris i doser, der normalt er højere (100 mg om dagen) end den foreslåede dosis for Oracea (40 mg om dagen).
According to several international guidelines, doxycycline is also commonly recommended for the treatment of rosacea but is only approved in a few EU countries; consequently the off-label use of doxycycline is widely prescribed in clinical practice for long-term treatment (months to up to several years) of acne vulgaris, with dosages generally higher (100 mg daily) than the proposed dosage for Oracea (40 mg daily).