549 ARTICLES · UPDATED WEEKLY

Noticias

Field guides, regulatory updates, and product breakdowns from the team behind American Screening Corporation's drug testing supplies.

More from the lab notebook

Page 15 of 46
Does Naproxen Cause a False Positive Drug Test? NSAIDs, THC and Barbiturate Screens

Oct 5, 2026 ·7 min read

Does Naproxen Cause a False Positive Drug Test? NSAIDs, THC and Barbiturate Screens

Naproxen is one of the most common over the counter and prescription pain relievers in the country, sold under its generic name and under...

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Does Metronidazole Show Up on a Drug Test? Antibiotics, Alcohol Warnings and Panels

Oct 5, 2026 ·7 min read

Does Metronidazole Show Up on a Drug Test? Antibiotics, Alcohol Warnings and Panels

Patients who are prescribed metronidazole and then face a workplace or clinical drug screen often ask whether the antibiotic will show up as a...

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Does Methocarbamol Show Up on a Drug Test? Muscle Relaxants and Immunoassay Panels

Oct 5, 2026 ·7 min read

Does Methocarbamol Show Up on a Drug Test? Muscle Relaxants and Immunoassay Panels

Methocarbamol is one of the most commonly prescribed muscle relaxants in the United States, usually sold under the brand name Robaxin. Patients recovering from...

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Does Lisinopril Show Up on a Drug Test? ACE Inhibitors, Panels and Confirmation

Oct 5, 2026 ·7 min read

Does Lisinopril Show Up on a Drug Test? ACE Inhibitors, Panels and Confirmation

Lisinopril is one of the most commonly prescribed blood pressure medications in the country, which is exactly why job candidates and employees sometimes wonder...

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Does Levofloxacin Cause a False Positive Drug Test? Fluoroquinolones and Opiate Screens

Oct 5, 2026 ·6 min read

Does Levofloxacin Cause a False Positive Drug Test? Fluoroquinolones and Opiate Screens

Levofloxacin is a prescription antibiotic, and people who are taking it ahead of a scheduled workplace drug test sometimes want to know whether it...

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Does Hydrochlorothiazide Cause a False Positive Drug Test? Diuretics and Dilute Specimens

Oct 5, 2026 ·8 min read

Does Hydrochlorothiazide Cause a False Positive Drug Test? Diuretics and Dilute Specimens

Employees on blood pressure medication sometimes worry that a prescription will trip up a workplace drug test. Hydrochlorothiazide, often shortened to HCTZ, is one...

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Does Famotidine Cause a False Positive Drug Test? H2 Blockers and Methamphetamine Screens

Oct 5, 2026 ·7 min read

Does Famotidine Cause a False Positive Drug Test? H2 Blockers and Methamphetamine Screens

Famotidine is one of the most common over the counter and prescription heartburn medications on the market, sold under names like Pepcid and in...

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Does Doxycycline Cause a False Positive Drug Test? Antibiotics Compared

Oct 5, 2026 ·7 min read

Does Doxycycline Cause a False Positive Drug Test? Antibiotics Compared

Doxycycline is one of the most commonly prescribed antibiotics in the country, used for everything from acne to respiratory infections to malaria prevention, so...

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Does Ciprofloxacin Cause a False Positive Drug Test? Opiate Immunoassay Interference

Oct 5, 2026 ·7 min read

Does Ciprofloxacin Cause a False Positive Drug Test? Opiate Immunoassay Interference

Ciprofloxacin is one of the most commonly prescribed antibiotics in the United States, and it shows up often enough in pre employment and workplace...

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Does Baclofen Show Up on a Drug Test? GABA B Agonists and Workplace Panels

Oct 5, 2026 ·7 min read

Does Baclofen Show Up on a Drug Test? GABA B Agonists and Workplace Panels

Baclofen is a prescription muscle relaxant used for spasticity from conditions such as multiple sclerosis and spinal cord injury. Employees who take it, and...

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Does Atorvastatin Show Up on a Drug Test? Statins and Workplace Panels

Oct 5, 2026 ·7 min read

Does Atorvastatin Show Up on a Drug Test? Statins and Workplace Panels

Atorvastatin, sold under the brand name Lipitor, is a cholesterol lowering medication. It is not a controlled substance, and it is not a target...

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Does Amlodipine Show Up on a Drug Test? Calcium Channel Blockers and Panels

Oct 5, 2026 ·7 min read

Does Amlodipine Show Up on a Drug Test? Calcium Channel Blockers and Panels

Amlodipine is one of the most commonly prescribed blood pressure medications in the country, sold under its generic name and as part of combination...

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