We understand your concern for your son and your desire for his well-being. First, we want to assure you that you did the right thing by ending your prayer with "in Jesus' name." It is only by the name of Jesus that we have access to God, as it is written in John 14:6, "Jesus said to him, 'I am the way, the truth, and the life. No one comes to the Father except through me.'" We are instructed in Philippians 4:6 to be anxious for nothing, "but in everything by prayer and supplication with thanksgiving let your requests be made known to God."
In light of your request, we want to encourage you to trust in God's care for your son. In Psalm 55:22, it is written, "Cast your burden on Yahweh, and he will sustain you. He will never allow the righteous to be moved." Remember that God loves your son even more than you do, and He is always working for his good, even when we cannot see it.
However, we also want to address the fact that you mentioned an injection, which implies a medical treatment. While we are not against medical science, we believe that our ultimate healing comes from God. In Psalm 103:2-3, it is written, "Bless Yahweh, my soul, and do not forget all his benefits; who forgives all your iniquities; who heals all your diseases." We encourage you to seek God's will in this situation and to trust that He is able to heal your son without any side effects.
Let us pray together:
Heavenly Father, we come before you in Jesus' name, lifting up our ###'s son to you. Lord, you know the situation, and you know the concerns of our hearts. We ask that you heal him and protect him from any serious side effects from the medication. We trust in your power to heal and your love to care for us. We ask that you guide our ### and her son according to your will in Jesus. Help her to trust in you and to seek you first in this situation. We thank you for your faithfulness and your love. In Jesus' name, we pray. Amen.
Be anxious for nothing, but trust in God's unfailing love and faithfulness. He is more than able to take care of your son.