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Phentermine 37.5 mg Online — A 159 Pill Identification & Prescription Guide

A 159 Phentermine 37.5 mg is a prescription medication product identified by the “A 159” imprint. This page provides general information about the tablet, including its strength, appearance, active ingredient, prescription status, and important safety considerations.

Product Details

• Product: A 159 Phentermine
• Strength: 37.5 mg
• Imprint: A 159
• Active Ingredient: Phentermine hydrochloride
• Tablet Color: Verify against the current manufacturer/pharmacy information
• Tablet Shape: Verify against the current manufacturer/pharmacy information
• Prescription: Required

  CTA: Check Prescription & Licensed Pharmacy Options

  Medical Disclaimer: This page is for general educational and medication-identification purposes only. It is not medical advice and does not replace consultation with a qualified healthcare professional. Do not start, stop, or change prescription medication without professional guidance.

Prescription & Pharmacy Information

Phentermine is a prescription medication. If you are considering treatment, speak with a qualified healthcare professional and use a properly licensed pharmacy that verifies the prescription.

What Is A 159 Phentermine 37.5 mg?

A 159 Phentermine 37.5 mg is a prescription tablet identified by the “A 159” imprint. Pill-identification references identify it as phentermine hydrochloride 37.5 mg, a prescription anorectic medication.

The A 159 pill is described as an oval, white tablet with blue specks and the imprint “A 159.” The listed strength is 37.5 mg of phentermine hydrochloride.

Active Ingredient: Phentermine Hydrochloride

The active ingredient is phentermine hydrochloride. A 37.5 mg phentermine hydrochloride tablet is equivalent to 30 mg of phentermine base.

Generic Phentermine

Phentermine hydrochloride is the active drug ingredient used in generic phentermine products. Different manufacturers can produce tablets with different imprints, colors, shapes, and inactive ingredients, even when the active ingredient and strength are the same.

Prescription Status

Phentermine is a prescription-only medication and is classified as a Schedule IV controlled substance in the United States. It should be used only under the direction of an appropriately qualified healthcare professional.

Phentermine 37.5 mg Online: Prescription Process

If you are researching phentermine 37.5 mg online, it is important to understand that phentermine is a prescription medication and a Schedule IV controlled substance in the United States. A legitimate online pharmacy should dispense it only through the applicable prescription process.

Prescription Requirement

A valid prescription from an appropriately qualified healthcare professional is required. The prescribing professional determines whether phentermine is appropriate after considering the patient’s health history, current medications, and treatment goals.

Healthcare-Provider Evaluation

Before receiving a phentermine prescription, a healthcare professional should evaluate whether the medication is medically appropriate. Official labeling describes phentermine as a short-term adjunct to a weight-reduction program for certain patients with obesity.

Licensed Online Pharmacy

When obtaining medication through a phentermine online pharmacy, use a properly licensed pharmacy that operates according to applicable laws and prescription requirements. Be cautious of websites offering prescription medication without appropriate verification.

Prescription Verification

A legitimate pharmacy may verify the prescription and relevant patient information before dispensing the medication. The exact verification process can vary according to the pharmacy and applicable regulations.

A 159 Tablet Identification

The A 159 pill is an imprint associated with phentermine hydrochloride 37.5 mg. Pill-identification references describe the tablet as an oval tablet with a white base and blue specks.

Imprint: A 159

The imprint is the identifying code printed on the tablet and is one of the key details used when identifying a prescription pill.

Color: White with blue specks

This combination, together with the A 159 imprint and oval shape, is listed by pill-identification references for phentermine hydrochloride 37.5 mg.

Shape: Oval

The tablet is listed as oval rather than capsule-shaped.

Strength: 37.5 mg phentermine hydrochloride

The identified A 159 tablet is listed as containing 37.5 mg of phentermine hydrochloride.

Manufacturer / Labeler: Qualitest Pharmaceuticals Inc

NDC: NDC 00603-5191

Phentermine 37.5 mg Dosage Information

Phentermine 37.5 mg dosage should be individualized by a healthcare professional to achieve an appropriate response using the lowest effective dose. Official U.S. labeling states that the usual adult dose for a 37.5 mg tablet is one tablet daily, as prescribed by the physician.

According to official labeling, the usual 37.5 mg dose is taken before breakfast or 1–2 hours after breakfast. Late-evening administration should be avoided because phentermine may cause insomnia.

Individual dosing can vary depending on the patient’s circumstances. Take phentermine exactly as prescribed and follow the directions provided by the healthcare professional and prescription label.

Don’t Change the Dose Without Medical Advice

Do not increase, decrease, split, or otherwise change your prescribed dose without first consulting your healthcare professional. The official labeling specifically states that dosage should be individualized according to the patient’s needs.

Benefits & Uses

Weight Management

Phentermine hydrochloride is indicated as a short-term adjunct to a weight-reduction program for certain patients with obesity. Official prescribing information specifies that it should be used alongside caloric restriction, exercise, and behavioral modification, rather than as a standalone weight-management approach.

Appetite Suppressant

Phentermine is a sympathomimetic amine anorectic that can help reduce appetite. Its appetite-suppressing effect may support reduced food intake when used as part of a medically supervised weight-management plan.

Obesity Treatment

Phentermine is approved for short-term use—generally described in the labeling as a few weeks—in the management of exogenous obesity for appropriately selected patients. U.S. labeling describes use for patients with an initial BMI of 30 kg/m² or greater, or 27 kg/m² or greater when certain weight-related risk factors are present.

Dietary & Behavioral Changes

Medication is intended to complement lifestyle measures. A weight-management plan may include calorie restriction, regular physical activity, and behavioral modifications, as outlined in the individual’s healthcare plan.

Side Effects & Safety

Phentermine can cause side effects and has important warnings and contraindications. Because it is a prescription stimulant and controlled medication, treatment should be supervised by a qualified healthcare professional.

Common Side Effects

Reported phentermine side effects can include:

• Dry mouth
• Unpleasant taste
• Constipation or diarrhea
• Restlessness
• Dizziness
• Headache
• Insomnia
• Tremor
• Increased heart rate or palpitations
• Increased blood pressure

Individual reactions can vary, and not everyone experiences these effects.

Important Contraindications

Phentermine should not be used by people with certain conditions, including a history of significant cardiovascular disease or uncontrolled hypertension, hyperthyroidism, glaucoma, agitated states, or a history of drug abuse. It is also contraindicated during pregnancy and nursing and in people with known hypersensitivity to sympathomimetic amines.

Phentermine is also contraindicated during or within 14 days after treatment with an MAOI because of the risk of a hypertensive crisis.

Drug Interactions

Important phentermine drug interactions include:

• MAO inhibitors: contraindicated because of the risk of severe hypertension.
• Other weight-loss medications: combination treatment is not recommended because safety and effectiveness have not been established.
• Certain serotonergic agents, including some SSRIs: combined use has not been established as safe.
• Alcohol: may increase the risk of adverse reactions.
• Insulin or oral diabetes medicines: dosage requirements may change in some patients.

Always tell your healthcare professional about prescription medicines, OTC products, supplements, and herbal products you use.

Cardiovascular Warnings

Phentermine can increase heart rate and blood pressure. Rare cases of primary pulmonary hypertension and serious heart-valve disease have also been reported. People with cardiovascular disease or uncontrolled hypertension should not use phentermine.

Misuse & Dependence

Phentermine is a Schedule IV controlled substance in the United States and has a risk of abuse and dependence. It should be taken only as prescribed and should never be shared with another person.

When Medical Attention Is Needed

Seek prompt medical attention for new or unexplained shortness of breath, chest pain, fainting, or swelling of the legs, as these can be warning signs of potentially serious cardiovascular or pulmonary complications.

Who May Be Eligible?

Phentermine eligibility is determined by a healthcare professional after considering BMI, obesity-related health risks, medical history, current medications, and potential contraindications. Meeting a BMI threshold alone does not automatically mean that phentermine is appropriate.

BMI

U.S. prescribing information indicates phentermine as a short-term adjunct for weight reduction in adults with an initial BMI of 30 kg/m² or greater, or BMI of 27 kg/m² or greater when certain additional risk factors are present.

Obesity & Weight-Related Conditions

For people with a BMI of at least 27 kg/m², prescribing information identifies certain additional risk factors that may be relevant, including controlled hypertension, diabetes, and hyperlipidemia. A healthcare professional must determine whether treatment is appropriate for the individual.

Medical History

A healthcare provider should review medical history before prescribing phentermine. Relevant conditions can include cardiovascular disease, hypertension, hyperthyroidism, glaucoma, pregnancy, nursing, and a history of drug misuse, among others. Some of these conditions are contraindications.

Current Medications

Current prescription medicines, over-the-counter products, supplements, and other weight-management medications should be reviewed before treatment. In particular, monoamine oxidase inhibitors (MAOIs) are contraindicated with phentermine during treatment and for 14 days after an MAOI is stopped.

Healthcare-Provider Assessment

A qualified healthcare professional should assess whether the potential benefits of phentermine outweigh its risks for the individual. The medication is intended as part of a broader weight-reduction program involving caloric restriction, physical activity, and behavioral modification.

Prescription Requirement

Phentermine is a prescription medication and is classified as a Schedule IV controlled substance in the United States. Eligibility and prescribing decisions should therefore be made by an appropriately qualified healthcare professional.

A 159 Phentermine Product Specifications

Feature	Details
Product	A 159 Phentermine
Strength	37.5 mg
Imprint	A 159
Active ingredient	Phentermine hydrochloride
Color	White & Blue Specks
Shape	Oval
Manufacturer	Qualitest Pharmaceuticals Inc
Prescription	Required

 

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Frequently Asked Questions

What is A 159 Phentermine 37.5 mg?

A 159 is an imprint associated with a 37.5 mg phentermine hydrochloride tablet. Pill-identification references describe it as an oval tablet with a white base and blue specks.

What does the A 159 imprint mean?

The A 159 imprint is the identifying marking printed on the tablet. Imprint, color, shape, and strength are commonly used together to identify prescription tablets. The A 159 imprint is listed with phentermine hydrochloride 37.5 mg.

What strength is A 159?

The A 159 tablet is listed as containing 37.5 mg of phentermine hydrochloride. Official labeling identifies 37.5 mg as one available tablet strength of phentermine hydrochloride.

What does A 159 Phentermine look like?

Pill-identification references describe A 159 as an oval tablet that is white with blue specks, with “A 159” printed on it. Appearance should be checked together with the imprint and prescription information rather than used alone for identification.

Is A 159 a generic phentermine tablet?

A 159 is identified as phentermine hydrochloride, the active ingredient used in generic phentermine products. Different manufacturers and formulations can have different imprints and appearances.

Is phentermine 37.5 mg prescription-only?

Yes. Phentermine is a prescription medication. In the United States, it is also classified as a Schedule IV controlled substance and should be used under appropriate medical supervision.

Can phentermine 37.5 mg be obtained from an online pharmacy?

It may be dispensed by a legitimate, appropriately licensed online pharmacy when applicable prescription requirements are satisfied. A pharmacy should verify the prescription before dispensing phentermine. Avoid websites offering prescription medication without appropriate authorization or verification.

How is phentermine 37.5 mg generally taken?

Official labeling states that the usual adult dose of a 37.5 mg tablet is one tablet daily as prescribed by the physician, generally before breakfast or 1–2 hours after breakfast. Late-evening administration should be avoided because of the possibility of insomnia. Individual dosing can differ, so patients should follow their own prescription.

What are common phentermine side effects?

Possible side effects include dry mouth, unpleasant taste, constipation, restlessness, dizziness, headache, insomnia, tremor, increased heart rate, and increased blood pressure. The severity and occurrence can vary between individuals.

Who may be eligible for phentermine treatment?

U.S. labeling describes phentermine as a short-term adjunct to a weight-reduction program for certain adults with obesity, including patients with an initial BMI of 30 kg/m² or greater, or 27 kg/m² or greater with certain additional risk factors. A healthcare professional must determine whether treatment is appropriate.

How should phentermine tablets be stored?

Storage instructions can vary by specific product and manufacturer. Follow the storage conditions on the prescription label and manufacturer’s packaging, and keep the medication in a secure location away from children and anyone for whom it was not prescribed.

How can I verify an A 159 tablet?

Use several identifying characteristics together—imprint, color, shape, strength, and packaging information—and compare them with a reliable pill-identification or official medication source. The A 159 imprint is listed as phentermine hydrochloride 37.5 mg, white with blue specks and oval.

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