From instructions supplied with nebido.
As with all oily solutions, Nebido must be injected strictly intramuscularly and very slowly (for at least two minutes). Pulmonary microembolism of oily solutions can in rare cases lead to symptoms such as cough, dyspnea, nausea, excessive sweating, chest pain, dizziness, paraesthesia, or syncope. These reactions may occur during or immediately after the injection and are reversible. Patients should be monitored during and immediately after each injection to early to be able to see possible signs and symptoms of microembolism of the lung caused by oil. Treatment is usually, for example by administration of oxygen.