An ospemifene solid dispersion for enhancing solubility and bioavailability,, and methods of preparation thereof are disclosed. The solid dispersion comprises an active pharmaceutical ingredient, such as ospemifene, and a hydfophilie carrier, such as copovidone, hypromellose acetate succinate, polyvinylpyrrolidine, a polyvinylpyrrolidine/vinyl acetate co-polymer, hydroxy! propyl methylcellulose, hypromellose acetate succinate, a Eudragit® compound, hydroxypropylcellulose, a polyvinyl caprolactam-polyvinyl acetate polyethylene glycol graft co-polymer, hydroxypropyl methylcellulose phthalate, and mixtures thereof, and optionally a surfactant The ospemifene solid, dispersions can be used in methods of treating a symptom related, to menopause, such as vaginal dryness or sexual dysfunction, or in methods of treating osteoporosis.
