Can L Montus And Becosules Cause Any Problem If Take Together?

hello doctor i am aged 22 and i am taking L-montus tablets daily for an allergy problem as it was prescribed to me earlier by my doctor.presently i have got a new problem of mouth ulcers now i am in doubt can i take becosules capsule to cure these mouth ulcers while letting that l-montus tablet continue or i shall stop l-montus till my ulcers don't get cure.will there be any side effect of taking both these drugs simultaneously?