Silver is a soft metal that is used medically in surgical instruments, dental prostheses, and alloys. According to FDA final rule, all over-the-counter drug products containing colloidal silver ingredients or silver salts for internal or external use are not generally recognized as safe and effective and are misbranded.

D&C RED NO. 36 1-[(2-chloro-4-nitrophenyl)azo]-2-naphthalenol (CAS Reg. No. 2814-77-9) is a color additive. According to FDA the color additive D&C Red No. 36 may be safely used for coloring ingested drugs, other than mouthwashes and dentifrices, in amounts not to exceed 1.7 milligrams per daily dose of the drug for drugs that are taken continuously only for less than 1 year. For drugs taken continuously for longer than 1 year, the color additive shall not be used in amounts to exceed 1.0 milligram per daily dose of the drug. D&C Red No. 36 may be safely used for coloring externally applied drugs in amounts consistent with current good manufacturing practice. In cosmetics and personal care products, D&C Red No. 36 is a colorant used in the formulation of blushers, lipsticks, face powders, and other makeup products, as well as nail polish and enamels.

Pimagedine is a nucleophilic hydrazine. It was shown to inhibit diamine oxidase (histaminase), which catalyzes the oxidative deamination of diamines histamine and putrescine. Pimagedine was also reported to inhibit nitric oxide synthase (NOS) based on its structural similarity to the NOS substrate L-arginine. Although pimagedine affects constitutive NOS (cNOS) isoform, it has been demonstrated to be a relatively selective inhibitor of the inducible NOS (iNOS) isoform. Pimagedine was shown to stabilize S-adenosylmethionine decarboxylase (SAMDC). Pimagedine (aminoguanidine HCl) has been shown to be an effective agent in reducing the severity of the structural and functional alterations associated with experimental diabetic nephropathy. But clinical trial of pimagedine to prevent progression of diabetic nephropathy was terminated early due to safety concerns and apparent lack of efficacy.