The present invention relates to solid dosage forms for parenteral delivery of therapeutic peptides. The substantially dry solid dosage forms comprise carboxymethylcellulose (CMC) which increases the strength, for example, compressive strength of the formulation, to enable reliable parenteral delivery. The solid dosage form comprises 0.01 to 50%(w/w) of a therapeutic peptide and at least 5%(w/w) of CMC excipient and has a moisture content of 5%(w/w) or less. The composition may further comprises a bulking agent, e.g. mannitol. The peptide may be octreotide, PTH 1-34 or exenatide. Also claimed is a method of producing the solid dosage form comprising blending the peptide, CMC and additional excipients, adding water to make a paste, extruding the paste to form an extruded product, drying the extruded product and cutting the product into solid dosage forms.