In this study, we developed and evaluated two medical large language models, Clinical-BR-LlaMA-2-7B and Clinical-BR-Mistral-7B-v0.2, specifically designed for Brazilian Portuguese. Utilizing the Low-Rank Adaptation (LoRA) technique, our models achieved significant improvements in generating synthetic clinical text, particularly in terms of Authenticity of Format and Structure, Spelling Accuracy, and Clinical Coherence. The evaluation, conducted by medical students using a 5-point Likert scale, demonstrated the effectiveness of our approach compared to baseline models. The scores indicate superior performance compared to baseline models such as LlaMA-2-7B and Mistral-7B-v0.2. Our results suggest that these resource-efficient models can effectively generate clinically relevant text, maintaining high standards of structure, accuracy, and coherence. Future work will focus on expanding datasets, refining evaluation protocols, and enhancing model robustness to further improve performance across various medical tasks.