The best replacement for nitrates is nitrites.

The best alternatives to nitrates are rated as following:
★★★★★  nitrites
★★  calcium channel blockers
★  nitroglycerin
★  leukocytes
★  nitrates
★  nicorandil
  nitroprusside
  mononitrates
  sulfates

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Speaking about nitrates, one probably shouldn't forget about viagra.

Other search terms related to nitrates and their ratings are:
★★★★★ viagra
★★★ sildenafil
★★★ cialis
★★ phosphodiesterase inhibitors
nitrates
hydralazine
You have in mind a companion for nitrates and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of nitrates in all years. Click on graph for more.
nitrates
nitrites
calcium channel blockers