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At our 39 testing locations in Shepherd, Tennessee, Accredited Drug Testing delivers extensive drug and alcohol screening options. Whether it's for DOT compliance, non-DOT needs, breath or EtG alcohol assessments, or hair drug tests, we cater to individuals, businesses, and legal requirements. We ensure swift results with both instant testing and SAMSA certified lab analyses, and offer same-day services. Most centers are conveniently located near your Shepherd, TN home or office. We also provide Occupational Health Testing, Clinical Testing, and Background Checks.
Dial (800) 221-4291 or go online to register. Pick your desired test and select the most convenient site—suitable for personal testing, employee assessments, or tests for others. With a quick and simple scheduling process, you can arrange your test by calling us or booking online at any time. Our seamless procedure ensures hassle-free arrangements for drug testing in Shepherd.
* You must register by phone or online to receive your donor pass/registration prior to proceeding to the testing center. You must bring a valid government issued ID along with the registration/barcode number which was sent to you by email.
When you're searching for drug testing near me or drug testing locations, we provide a simple and convenient process to find a drug and alcohol testing location near you that is certified to provide all of your drug and alcohol testing needs.
At our Shepherd drug testing collection sites, Accredited Drug Testing provides one of the widest selections of drug and alcohol testing services available. Whether you're an employer, attorney, court, or private individual, we offer both DOT and non-DOT testing options—ranging from rapid tests to comprehensive lab-based screenings—capable of detecting nearly any substance.
DOT Drug Testing and Requirements
DOT Employer Drug Policy Development
If you're an employer needing to test 25 or more employees and looking to save time and money, we offer mobile on-site drug testing where we come to you. Call us today for more information.
In Shepherd, TN, located in Hamilton County, approximately 5% of residents reported illicit drug use in the past year.
Hamilton County, in which Shepherd resides, recorded 256 drug overdoses in 2021, marking a 15% increase from the previous year.
Shepherd, TN, saw a 10% rise in opioid-related incidents, reflecting a significant challenge within Hamilton County.
In 2022, Hamilton County reported 180 emergency room visits related to drug abuse from Shepherd residents.
The annual drug-related crime rate in Shepherd, TN, stands at 120 incidents per 100,000 people, according to Hamilton County records.
Shepherd, TN, is part of Hamilton County's effort to distribute more than 5,000 Narcan kits in 2022 to combat opioid overdoses.
Drug elimination is the sum of the processes of removing an administered drug from the body. In the pharmacokinetic ADME scheme (absorption, distribution, metabolism, and excretion), it is frequently considered to encompass both metabolism and excretion. Hydrophobic drugs, to be excreted, must undergo metabolic modification making them more polar. Hydrophilic drugs, on the other hand, can undergo excretion directly, without the need for metabolic changes to their molecular structures.
Although many sites of metabolism and excretion exist, the chief organ of metabolism is the liver, while the organ primarily tasked with excretion is the kidney. Any significant dysfunction in either organ can result in the accumulation of the drug or its metabolites in toxic concentrations.
A variety of other factors impact elimination — intrinsic drug properties, such as polarity, size, or pKa. Also other factors include genetic variation among individuals, disease states affecting other organs, and pathways involved in the way the drug distributes through the body, such as first-pass metabolism.
Drug elimination is the removal of an administered drug from the body. It is accomplished in two ways, either by excretion of an unmetabolized drug in its intact form or by metabolic biotransformation followed by excretion. While excretion is primarily carried out by the kidneys, other organ systems are involved as well. Similarly, the liver is the primary site of biotransformation, yet extrahepatic metabolism takes place in a variety of organ systems affecting multiple drugs.
Given the multiple organ systems and the variety of metabolic transformations present, drug elimination can entail a significant degree of complexity. Hydrophilic drugs are typically directly excreted by the kidneys, while hydrophobic drugs undergo biotransformation before excretion. The purpose here is twofold – biotransformation serves both detoxify the exogenous substances as well as to increase their hydrophilicity, ensuring their elimination via the kidneys.
Two broad metabolic pathways of hepatic drug transformation exist. Phase I is the direct modification of the target molecule, whereas phase II entails conjugation of the target to a polar molecule of low molecular weight. Phase I prepare the drug to enter phase II, but single-phase metabolism also exists.
Phase I involves oxidation, reduction, and hydrolysis of the exogenous molecule. These reactions are accomplished by hepatic microsomal enzymes, which reside in the smooth endoplasmic reticulum of the hepatocytes. Best known among them is the cytochrome P450 system, whose enzymes are predominantly involved in oxidative metabolism. Within the cytochrome P450 family (CYP), the enzyme responsible for the metabolism of more than 50% of existing drugs is the CYP3A4. Its activity encompasses various classes of medications, including opioids, immunosuppressants, antihistamines, and benzodiazepines. The enzymes can also be induced or inhibited by a variety of substances they interact with, including pharmaceuticals. The increase in metabolic activity with CYP induction results in a diminished activity of drugs targeted by that particular isoform. Conversely, CYP inhibition will result in increased drug plasma concentration, potentially leading toxicity. The CYP3A4 is induced by phenytoin, phenobarbital, and St. John's wort, while diltiazem, erythromycin, and grapefruit inhibit it. Caution is, therefore, necessary when administering CYP3A4-metabolized drugs in the presence of any of the inhibitors or inducers.
Phase II consists of covalent bonding of polar groups to nonpolar molecules to render them water-soluble and allow renal or biliary excretion. Target molecules enter phase II directly or via initial processing through phase I. A variety of polar adjuncts is transferred, including amino acids, glucuronic acid, glutathione, acetate, and sulfate. Glucuronidation is one of the major pathways of phase II biotransformation. The UDP-glucuronosyltransferase (UGT) enzyme family performs this activity. Typically, glucuronide derivatives possess less or no activity of the original drug, but in some cases, pharmacologically active compounds result. Morphine-6-glucuronide is a phase II metabolite of morphine with significant analgesic activity. As with the CYP enzymes, inducers, and inhibitors of phase II, enzymes exist and may influence the efficacy of drugs that rely on conjugation before excretion.
The first-pass effect is a feature of hepatic metabolism that also plays a role in the elimination of multiple drugs. Here, the enteric consumed drugs are exposed directly to the liver via the portal vein, where they undergo biotransformation before entering the systemic circulation. This activity reduces the bioavailability and needs to be factored into the dose administered to the patient. Intravenously administered drugs are not subject to the first-pass effect.
Extrahepatic drug metabolism takes place in the GI tract, kidneys, lungs, plasma, and skin.
Renal excretion completes the process of elimination that begins in the liver. Polar drugs or their metabolites get filtered in the kidneys and typically do not undergo reabsorption. They subsequently get excreted in the urine. Urinary pH has a significant impact on excretion, as drug ionization changes depending on the alkaline or acidic environment. Increased excretion occurs with weakly acidic drugs in basic urine and weakly basic drugs in acidic urine.
Excretion in the bile is another significant form of drug elimination. The liver can actively secrete ionized drugs with a molecular weight greater than 300 g/mol into bile, from where they reach the digestive tract and are either eliminated in feces or reabsorbed as part of the enterohepatic cycle.
Other pathways of excretion include the lungs, breast milk, sweat, saliva, and tears
In Shepherd, TN, many employers have implemented drug testing policies to ensure safe and productive workplaces. These policies are often aligned with guidelines from the Tennessee Department of Labor. More details on compliance can be found here.
Local businesses in Shepherd often use random drug testing as part of their employment agreements, deterring substance use among employees. This approach is part of a wider practice across Hamilton County to maintain workforce integrity.
The government of Shepherd, TN, actively participates in county-wide initiatives to curb drug abuse, including the Hamilton County Substance Use Prevention Coalition. This coalition works towards increasing awareness and providing resources to reduce substance abuse here.
Statewide efforts also bolster local initiatives, with Tennessee's Department of Mental Health & Substance Abuse Services offering support for drug abuse prevention programs in Shepherd. More information can be found on their official website.
Recent drug busts in Shepherd, TN, have highlighted ongoing issues with narcotics distribution in Hamilton County. In June 2023, local law enforcement conducted a raid that seized over 10 kilograms of cocaine, signifying a substantial victory against organized drug operations.
The Shepherd Police Department, in collaboration with Hamilton County Sheriff's Office, regularly holds workshops and informational sessions to engage the community in combating drug abuse. These events not only educate residents but also foster a community-driven approach to safety.
Accredited Drug Testing offers fast, reliable employment screening services in Shepherd, TN. Trusted by employers nationwide for accurate results and exceptional service.
Tennessee DOT/Non DOT Physicals
TN Department of Mental Health & Substance Abuse Services
Hamilton County Substance Use Prevention Coalition
Tennessee Department of Labor - Workplace Safety
Tennessee Substance Abuse Services
Chattanooga CARES
Cumberland Heights
Tennessee Department of Health - Substance Abuse
Tennessee Association of Alcohol, Drug & other Addiction Services
Metro Drug Coalition
HHS o-drugs
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This is by far the easiest way to get my lab work ordered and paid for. The phone calls are short and to the point. They don’t try to push extra sales on you and when I walk in to the clinic I simply show my donor pass and with in a matter of minutes I’m done. I will continue to use ADT in the future.
Jason Jackson - 7/19/2025
Everything was great, the staff was very polite. Thank you.
Olga Petrova - 9/19/2024
The visit here is always the best . The place is always really clean. The employees are super courteous, very polite, and professional. This is the only drug lab I like to go do my drug and alcohol test. I would like to tell them thank you so much for thier excellent performance and job
Eli Gonzalez - 1/4/2025