Effective contraception is to be followed while using Bonspri Injection and is to be used for up to six months from the last dose of this medication. Inform your doctor if you get pregnant while using this medication or within six months from the last dose. Upper respiratory tract infections, decrease in the level of immunoglobulin M protein in the blood, oral herpes, pain or itching or redness or swelling at the injection site are some common side effects of this medication.