Itraconazole
Itraconazole is a triazole antifungal that stops fungi from making ergosterol, a building block of their cell membrane, halting fungal growth. It is prescription-only and used for fungal infections, including stubborn ones in the nails, skin and deeper tissues.
Absorption depends on stomach acid and on food, so it is taken with a meal and kept apart from antacids by a couple of hours. It strongly inhibits the liver enzyme that clears simvastatin and atorvastatin, which is why those statins are avoided with it, and it can increase the effect of warfarin. It can weaken the heart's pumping strength, hence the caution in heart failure, and ALT and AST are followed to watch the liver.
See a doctor for new or worsening breathlessness, swelling of the ankles, or sudden weight gain, for jaundice, dark urine or ongoing nausea, and for unexplained muscle pain or weakness, or bleeding that does not settle.
Reference information, not medical advice. Discuss any change with your doctor.