Doxycycline is a broad spectrum tetracycline antibiotic effective against some streptococcus species. Whilst not first line treatment, it can be used to treat strep throat and to prevent rheumatic fever. It should be used for no less than 10 days.

Strep throat is an infection of the throat and tonsils caused by a Streptococcal bacteria. Typical symptoms are sore throat, chills, fever, and swollen lymph nodes in the neck. Strep throat can be treated with antibiotics and should be treated as soon as possible. If left untreated, strep throat can cause serious heart and kidney complications.

Penicillin or amoxicillin are drugs of choice and should be taken for 10 days even if symptoms disappear after a few days to ensure that the infection does not return, and to minimise the risk of developing heart or kidney diseases.

Erythromycin is suitable for those that are allergic to penicillin.

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