MIght need to see a doctor and get a prescription if its that high
Some ways to get Hct down
1. Drink 3-4 liters of water w electrolytes 2-3 hours before lab draw
2. Some guys like myself see benefit by supplementing with Naringin and Nattokinase, Ive been taking Hemoflow by leviathin nutrition, however its pricey
3. I also supplement with tumeric which can help decrease iron absorption
4. Get tested for sleep apnea , lots of us have sleep apnea and this 100% increases your Hct
5. If your running a cycle, Id stop for 3-4 weeks, let everything clear out and go back to a really low dose of TRT, like 120-140 test a week
6. All androgens, even testosterone can increase erythropoiesis and subsequently lead to higher hematocrit. Some of the more common culprits are Equipoise, Anadrol, Deca/nandrolones . But even Primo and anavar can affect Hct as well , so be careful with compound selection
7. Avoid iron supplements and vitamin C, as Vit C increases dietary iron absorption
Hope this helps