These are put in a solution and catalyzed using dimethyl sulfate at 1300 °C (2372 °F) to give many different types of triazole derivatives. These are purified using alcohol and chromatography. Terconazole is non-reactive except when exposed to strong oxidizing agents or strong bases due to the nitrogen attached to the triazole ring. It has been found to be photosensitive. Mechanism of action
Terconazole binds to the heme iron component on the cytochrome P450 enzyme lanosterol of fungi, also known as CYP3A4. The gene ERG11 controls lanosterol creation. Lanosterol is found within the yeast plasma membrane. It is a class of methylsterol. Within a normal yeast cell, lanosterol is demethylated using 14α-demethylation. This process creates zymosterol: a major constituent in the ergosterol biosynthesis pathway for the creation of cell membrane constituents in yeast. This structure provides the membrane with fluidity. This occurs by transforming lanosterol into 4,4-dimethyl cholesta-8,14,24-triene-3-β-ol. This stops respiration by prohibiting reduction of NADH to NAD. This stops biosynthesis of cell membrane products as well as transport and catabolism. Eventually, membrane fluidity and activity of membrane bound enzymes become depleted. It has also been shown to inhibit morphologic change of yeast as well as cell adherence and is directly toxic to yeast. Terconazole targets fungi specifically since humans do not use lanosterol in this pathway. This process does not affect all fungi such as Pneumocystis jirovecii, which lacks lanosterol. Metabolism
Absorption of terconazole is 5–8% in patients that have had a hysterectomy and 12–16% in other patients.
Previously, all triazole based drugs targeted fungal infections related to plants from Candida species. Since creation, terconazole has been superseded by second-generation triazoles due to their even broader spectrum and higher activity levels against resistant pathogens like Aspergillus spp. It is still used as a treatment in cases of resistance to other drugs. Available forms
Terconazole is a white, odourless powder. It can be purchased commercially in the following forms:

Terconazole 0.4% cream 5 g applied intravaginally once a day for 7 days;
Terconazole 0.8% cream 5 g applied intravaginally once a day for 3 days;
Terconazole 80 mg vaginal suppository used once daily for 3 days. References
External link
Information about terconazole from the United States Government