During a 7-year period proximal gastric vagotomy (PGV) was performed in 565 patients. Of these, 210 patients with duodenal ulcer and 14 with dyspepsia without demonstrable ulcer at the time of operation were followed for 5--7 years. Sixty-six percent are symptom-free (Visick I), 23% have no complaints when they take certain dietary measures (Visick II), 3% are improved but still have periods of dyspepsia (Visick III), and 8% are failures because of recurrent ulcer (Visick IV). There were 4 duodenal, 3 pyloric, 5 prepyloric, and 7 lesser-curve gastric recurrences. There were one operative death (0.2%) and one major complication (0.2%). The side effects after PGV are mild, infrequent, and seldom of any significance to the patients. Diarrhoea and dumping are virtually eliminated. Body weight was stable during the whole period of study, and blood chemistry did not disclose any deficiency in haemoglobin, serum iron, or vitamin B12 which might be attributed to PGV. It is concluded that 5--7 years after proximal gastric vagotomy for duodenal ulcer there is a 10% recurrence rate, but the low risk of death and of severe complications and the lack of significant side effects more than outweight the high recurrence rate.