While phenazopyridine has never been shown to cause cancer in humans, evidence from animal models suggests that it is potentially carcinogenic. Pregnancy
This medication is pregnancy category B. This means that the medication has shown no adverse events in animal models, but no human trials have been conducted. It is not known if phenazopyridine is excreted in breast milk. Pharmacokinetics
The full pharmacokinetic properties of phenazopyridine have not been determined. It has mostly been studied in animal models, but they may not be very representative of humans. Rat models have shown its half-life to be 7.35 hours, and 40% is metabolized hepatically (by the liver). Mechanism of action
Phenazopyridines mechanism of action is not well known, and only basic information on its interaction with the body is available. It is known that the chemical has a direct topical analgesic effect on the mucosa lining of the urinary tract. It is rapidly excreted by the kidneys directly into the urine. Hydroxylation is the major form of metabolism in humans, and the azo bond is usually not cleaved. On the order of 65% of an oral dose will be secreted directly into the urine chemically unchanged. Brand names
In addition to its generic form, phenazopyridine is distributed under the following brand names:

References
External links
Information about phenazopyridine from the US National Library of Medicine
Interstitial Cystitis Association
American Urological Association
Stimulant use disorder is a type of substance use disorder that involves the non-medical use of stimulants. It is defined in the DSM-5 as "the continued use of amphetamine-type substances, cocaine, or other stimulants leading to clinically significant impairment or distress, from mild to severe". These psychoactive drugs, known as stimulants, are the most widely used drugs in the world today. Approximately 200 million Americans have used some type of stimulant in the past year alone. Definition
A psychoactive drug, such as a stimulant, is a chemical or substance that affects one’s behavior, mind, and body. A stimulant can be smoked, injected, snorted, taken in pill form, chewed, and even ingested in the form of a drink. Synthetic stimulants are becoming increasingly popular as users attempt to alter the chemicals in drugs to create different reactions, and ultimately steer clear of jail time, legal penalties, and detection in drug screening efforts.If a substance is used over a long period of time and the user becomes dependent upon it, a substance use disorder may develop. Substance use may lead to substance dependence and with time, addiction. Both mental and physiological dependence requires the development of tolerance leading to withdrawal symptoms. Stimulants come in a very large variety of subtypes and among the most common are caffeine, nicotine, cocaine, methamphetamine, amphetamines, amphetamine congeners, electronic cigarettes, diet pills, plant stimulants, energy drinks, and the ever-evolving designer stimulants such as bath salts.