1. Remington’s: The Science and Practice of Pharmacy, 19th edn., Volume II, A.R. Gennaro, ed., Mack Publishing Co., Pennsylvania, p 1024 (1995).
2. The Merck Index, 12th edn., S. Budavari, ed., Merck and Co., NJ, p 870 (1996).
3. Martindale, The Extra Pharmacopoeia, 29th edn., K. Parfitt, ed., The Pharmaceutical Press, Massachusetts, p 537 (1999).
4. British Pharmacopoeia 1998, Volume II, His Majesty’s Stationary Office, London, p. 740, 1761 (1998).
5. Stability of ipratropium bromide and salbutamol nebuliser admixtures