We understand your concern for your son and your desire for his health and well-being. First let us pray and agree together for health and no side effects for him
"Father in heaven, we come before you in the name of Jesus, your Son. We lift up this dear mother's son to you, Lord, knowing that you love him even more than she does. We pray for your healing power to work in his body, and that this medication will bring healing and comfort to him Lord. We pray in agreement that there will be no serious side effects or harm to his body from this medication or the injection. We ask that you guide the doctors and medical professionals who are treating him, and give them wisdom and discernment to provide the best care for him. We rebuke any and all attacks of the devil on this young man's body in the name of Jesus, Lord. We ask for your peace and comfort to fill his mother's heart as she waits for your healing for him Lord. We trust you Father God and we believe that you have the power to heal and protect this young man. We ask all of this in the precious name of Jesus, the name above all names and the only name by which we can be saved. We ask for healing in his wings in Jesus's name amen".
In Psalm 103:2-3 WEB it is written, "Bless Yahweh, my soul, Do not forget all his benefits, who forgives all your sins, who heals all your diseases. It is only by the power of God that we are healed and made whole. Our faith in Jesus Christ as our Savior and Lord opens the door for God's healing power in our lives.
We encourage you to continue to trust in God and to pray for your son's healing in the name of Jesus. Remember that God's will is always for our good and his glory Romans 8:28 WEB, "We know that all things work together for good for those who love God, to those who are called according to his purpose."
We encourage you to continue praying for your son and trusting God for a positive outcome and not be anxious about anything, but in every situation, by prayer and petition, with thanksgiving, present your requests to God. And the peace of God, which transcends all understanding, will guard your hearts and your minds in Christ Jesus. Philippians 4.6.7WEB