Gleptosil Dosage and administration For intramuscular injection only. The recommended site for injection is the hind limb. Use only automatic syringe equipment. Prevention: 1 mL (200 mg iron) per piglet injected within the first three days of life. Treatment: 1 mL (200 mg iron) per piglet injected at the onset of clinical anaemia, normally within the first three weeks of life.