Pharmaceutical preparations for topical gels and ointments for transdermal delivery of analgesics, anti-inflammatory agents, antineoplastic agents, muscle relaxants, anaesthetic agents, peptides, proteins, growth factors, hormones, substance P antagonists, antifungal compounds, antiviral compounds, antibacterial compounds, antiobesity drugs, homeopathic agents, antianginal compounds, hair growth stimulators or retardants, nutrients, and antimetabolites