Nitrofurantoin (Furadantin) can create two kinds of sideeffects: i) toxic; 2) allergic.Slight to moderate side-effects of both kinds are quite common; severe side-effects, however, are rare. The most serious toxic side-effect is polyneuropathy caused by a dose too large in relation to the patient's renal function. The most serious side-effect of the allergic type is a syndrome, unique for nitrofurantoin, whose main effects are symptoms in the lungs. So far about 30 cases with acute and 6 with chronic pulmonary reactions have been described (20, 15). However, further cases are known and it is not unlikely that this allergic reaction occurs more commonly than the above-mentioned numbers indicate.
CASE REPORTThe case related here is a woman, aged 37, Para 3. Since the beginning of the 1950's she has been treated with sulfonamides on several occasions, for what was believed to be cystitis. Towards the end of her latest pregnancy in the spring of 1968 she suffered several attacks similar to those caused by renal calculi. Because of this, after delivery urography was carried out, and this showed irregular calyces and minor calcifications bilaterally, believed to be signs of earlier pyelonephritis. The patient had no fever, urine cultures gave negative results, erjfthrocyte sedimentation rate/i hour was 10 mm and white blood corpuscles 3000/mm' with 57 per cent polymorphonuclear cells. On September 9/68 long-term therapy with nitrofurantoin tablets in the relatively small dose of 50 mg X 3 was introduced as a safety measure. After a week's treatment the patient's temperature rose suddenly to 39.8° C, as can be seen from the diagram. At the same time she experienced general pain in her body which she localised in her joints, shivering chills, a stitch on deep breathing, manifest dyspnea and