1. L-Arginine (L-Arg) exhibits anti-atherosclerotic effect. 2. L-Arginine and soy enriched diet are effective in prevention of osteoporosis associated with diabetes mellitus. 3. Exogenous L-Arginine could enhance neonate lymphocyte proliferation through an interleukin-2-independent pathway. 4. A combination of oral L-citrulline and L-Arginine effectively and rapidly augments NO-dependent responses at the acute stage.

Tranilast (SB 252218), an antiallergic drug, suppresses lipid mediator and cytokine release from inflammatory cells, therefore utilized in the treatment of allergic disorders.

Methylene Blue trihydrate (Basic blue 9) is a compound consisting of dark green crystals or crystalline powder, having a bronze-like luster. Solutions in water or alcohol have a deep blue color. Methylene Blue trihydrate is used as a bacteriologic stain and as an indicator. It inhibits soluble guanylyl cyclase and has been used to treat cyanide poisoning and to lower levels of methemoglobin. It also inhibits tau filament formation (IC50: 1.9μM).

L-Arginine hydrochloride is a nitrogen donor for synthesis of nitric oxide.

S-Methylisothiourea sulfate ((S)-Methylisothiourea sulfate) is a potent and selective inhibitor of iNOS and exerts beneficial effects in rodent models of septic shock[1].

Nitroarginine (N'-Nitro-L-arginine) is a competitive inhibitor of nitric oxide synthase which causes the selective reduction of blood flow to tumor cells[1].

2,4-Diamino-6-hydroxypyrimidine (DAHP) (DAHP) is a selective, specific inhibitor of GTP cyclohydrolase I, the rate limiting step for de novo pterin synthesis

Aminoguanidine hydrochloride (Hydrazinecarboximidamide) is a diamine oxidase and NO synthase inhibitor, used in the treatment of diabetic nephropathy.