Systemic absorption
Long-term continuous topical therapy should be avoided, particularly in infants and children.
Depending on the application site, possible systemic absorption of betamethasone valerate should always be considered during treatment with fusidic acid/betamethasone.
Immunosuppressant effects
Reversible hypothalamic pituitary adrenal (HPA) axis suppression may occur following systemic absorption of topical corticosteroids.
Fusidic acid/betamethasone should be used with care in children as paediatric patients may demonstrate greater susceptibility to topical corticosteroids induced HPA axis suppression and Cushing's syndrome than adult patients. Avoid large amounts, occlusion and prolonged treatment (see section 4.8).
Adrenal suppression can occur even without occlusion. Cushing syndrome may occur as a potential risk in line with adrenal suppression. Atrophic changes may occur on the face and to a lesser degree in other parts of the body, after prolonged treatment with potent topical steroids.
Bacterial resistance
Bacterial resistance has been reported to occur with the use of fusidic acid applied topically. As with all antibiotics, extended or recurrent application may increase the risk of developing antibiotic resistance. Limiting therapy with topical fusidic acid and betamethasone valerate to no more than 14 days at a time will minimise the risk of developing resistance.
This also prevents the risk that the immunosuppressive action of corticosteroid might mask any potential symptoms of infections due to antibiotic resistant bacteria.
Due to the content of corticosteroid having immunosuppressant effect, fusidic acid/ betamethasone may be associated with increased susceptibility to infection, aggravation of existing infection, and activation of latent infection. It is advised to switch to systemic treatment if infection cannot be controlled with topical treatment (see section 4.3).
Steroid-antibiotic combinations should not be continued for more than 7 days in the absence of any clinical improvement since in this situation occult extension of the infection may occur due to the masking of the steroid. Similarly, steroids may also mask hypersensitivity reactions.
Eye effects/local effects
Visual disturbance may be reported with systemic and topical corticosteroid use. If a patient presents with symptoms such as blurred vision or other visual disturbances, the patient should be considered for referral to an ophthalmologist for evaluation of possible causes which may include cataract, glaucoma or rare diseases such as central serous chorioretinopathy (CSCR) which have been reported after use of systemic and topical corticosteroids.
Due to the content of corticosteroid, fusidic acid/betamethasone should be used with care near the eyes. Avoid getting fusidic acid/betamethasone into the eyes (see section 4.8).
Glaucoma might result if the preparation enters the eye. Raised intra-ocular pressure and glaucoma may also occur after topical use of steroids near the eyes, particularly with prolonged use in patients predisposed to developing glaucoma.
Long term continuous or inappropriate use of topical steroids can result in the development of rebound flares after stopping treatment (topical steroid withdrawal syndrome). A severe form of rebound flare can develop which takes the form of a dermatitis with intense redness, stinging and burning that can spread beyond the initial treatment area. It is more likely to occur when delicate skin sites such as the face and flexures are treated. Should there be a reoccurrence of the condition within days to weeks after successful treatment a withdrawal reaction should be suspected. Reapplication should be with caution and specialist advice is recommended in these cases or other treatment options should be considered.
Fire hazard
Instruct patients not to smoke or go near naked flames - risk of severe burns. Fabric (clothing, bedding, dressings etc) that has been in contact with this product burns more easily and is a serious fire hazard.
Washing clothing and bedding may reduce product build-up but not totally remove it.
Excipients
Fusidic acid/Betamethasone 20 mg/g + 1 mg/g cream contains cetostearyl alcohol which may cause local skin reactions (e.g. contact dermatitis) and chlorocresol which may cause allergic reactions.