Oral pharmaceutical film formulation for bitter tasting drugs

A pharmaceutical film formulation comprising:

• from 60% w/w to 75% w/w of sildenafil or pharmaceutically acceptable salts thereof,
• from 9% w/w to 20% w/w of hydroxypropylcellulose,
• a bitterness masker comprising:
• a) from 1% w/w to 5% w/w of one or more inorganic salt(s);
• and
• b) from 0.01% w/w to 2% w/w of monocyclic monoterpenes comprising N-ethyl-2 (isopropyl)-5-methyl cyclohexane carboxamide and menthol ethylene glycol carbonate;
• from 2% w/w to 6% w/w of one or more sweeteners;
• from 0.01% w/w to 15% w/w of one or more flavoring agents;
• and
• from 2.5 to 5% w/w of humectants comprising sorbitol and xylitol, wherein the humectants maintain the moisture content of the film formulation in a range of between 5 and 10% w/w,
• wherein the respective amounts of are based on the dry weight of the film formulation, and
• wherein the film is substantially free of voids.