dicloxacillin sodium /dī′kloksəsil″in/ , a penicillinase-resistant penicillin. ▪ INDICATIONS: It is prescribed in the treatment of bacterial infections, especially those caused by penicillinase-producing strains of staphylococci. ▪ CONTRAINDICATIONS: Known hypersensitivity to this drug or to any penicillin medication prohibits its use. ▪ ADVERSE EFFECTS: The most serious adverse effect is hypersensitivity reaction. Other side effects include nausea, vomiting, diarrhea, and epigastric distress.