Synthesized by Vincent du Vigneaud, Vasopressin infusions are used for septic shock patients not responding to fluid resuscitation or infusions of catecholamines (such as dopamine) to increase the blood pressure. Bear in mind that Vasopressin is also a hormone that affects the kidneys and reduces urine flow. It is also worth noting that the most common side effects during treatment with vasopressin are dizziness, angina, chest pain, abdominal cramps, heartburn, nausea, vomiting, trembling, fever, water intoxication, pounding sensation in the head, diarrhea, sweating, paleness, and flatulence. As for the most severe adverse reactions, they include myocardial infarction and hypersensitivity. Remember to tell your doctor if you are pregnant, because Vasopressin can actually cause premature labor contractions if you receive it during the second or third trimester of pregnancy. Besides, you should not breastfeed within 1.5 hours after you are treated with vasopressin. And if you use a breast pump during this time, throw out any milk you collect. In other words, do not feed it to your baby.