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Phentermine 37.5 mg


Phentermine 30 mg


Phentermine 15 mg


What is Phentermine?

Phentermine is a prescription weight-loss medication used in conjunction with a doctor-approved exercise, behavior modification, and low-calorie diet plan. The FDA has approved to buy Phentermine online for short-term use of up to 12 weeks for persons over 16. Phentermine is a Schedule IV Controlled drug. This signifies that it has a recognized medical application but also has the risk of abuse and dependence. Certain overweight people, such as those who are obese or have weight-related medical difficulties should get a phentermine prescription from a doctor online. Losing and maintaining weight helps to prevent the numerous health issues linked with obesity, such as heart disease, diabetes, high blood pressure, and a shortened life span.

How does Phentermine work?

Online weight loss programs Phentermine belongs to the class of medicines known as sympathomimetic amines. It is unknown how this medicine aids weight loss. Phentermine rx online may reduce your hunger, increase the amount of energy your body uses, or increase neurotransmitter levels in your brain. Neurotransmitters, also known as chemical messengers in your body, include norepinephrine, serotonin, and dopamine. When your levels of these three substances rise, your hunger level falls. However, you may develop a resistance to phentermine’s appetite-suppressing effects within a few weeks. If this occurs, contact the Phentermine online doctor who prescribed it. 

Phentermine for weight loss

Several clinical trials have demonstrated that phentermine can help people lose weight. Online doctors for Phentermine may prescribe it intermittently, which means you stop taking it for a specified length of time before restarting it. After three months of taking Phentermine weight loss pills online, the typical weight loss is 3% of your initial body weight and 5-7% after 6 months. Some people claim to have lost considerably more weight. However, not everyone reacts to Phentermine weight loss in the same manner. If you haven’t lost much weight after three months of using it, a doctor may advise you to stop taking it. Phentermine prescribed online is most commonly used to treat obesity, but it may also be used in conjunction with the medicine topiramate to treat eating disorders such as binge eating disorder.

How to take Phentermine

Phentermine prescription online doctor advises to take this medication by mouth, generally once a day, 1 hour before or after breakfast. If necessary, your doctor may adjust your dose so that you take a tiny dose up to three times daily. Taking Phentermine online prescription late in the day may result in difficulty sleeping (insomnia).

Sustained-release capsules are typically taken once a day before breakfast or at least 10 to 14 hours before bedtime. Take the medication whole. Sustained-release capsules should not be crushed or chewed. This can result in the Phentermine pills online being released all at once, increasing the risk of unwanted effects.

If you use dissolvable tablets, the dose is normally taken once a day in the morning, with or without breakfast. Before handling the Phentermine tablet, dry your hands. Place the dose on top of your tongue and wait for it to dissolve before swallowing it with or without water.

Phentermine dosage and forms

The only Phentermine doses available are Phentermine 37.5 mg, Phentermine 30 mg, and Phentermine 15 mg. Several factors will influence your dosage, medicine form, and frequency of administration. These elements are as follows:

  • your age
  • the condition being treated
  • how severe your condition is
  • other medical conditions you have
  • how you react to the first dose

Typically, your doctor will consider these concerns and begin with a modest Phentermine weight loss prescription online. Then they’ll modify it over time to find the appropriate amount for you. Finally, your doctor will recommend the smallest dose of Phentermine purchase that produces the desired effect.

The general dosage for adults:

15 to 37.5 mg once daily before breakfast or 1 to 2 hours after breakfast; in some cases, may administer 18.75 mg once or twice daily using the tablets.

The general dosage for pediatric (above 16 years):

8 mg orally 3 times a day 30 minutes before meals, OR 15 to 37.5 mg orally once a day before breakfast or 1 to 2 hours after breakfast.

Warnings for Phentermine

  • Phentermine prescription has the potential to cause PPH, a rare and potentially fatal lung illness. PPH is a type of high blood pressure that affects your lungs’ arteries and the right side of your heart. 
  • Phentermine script online might damage your heart valves. It’s possible that your valves won’t shut correctly and will leak. This could stop your body’s blood from flowing through your heart. 
  • Phentermine for weight loss has the potential to become addictive.  Never take more medication, use it more frequently, or use it for longer than prescribed. When prompted, discontinue the use of the medication. Before using this medication, tell your doctor if you have ever abused drugs or alcohol.
  • The combination of Phentermine and alcohol may enhance your risk of adverse effects from this medication. They can also entail a loss of sexual interest. Consult your doctor if you use alcohol. You may require more frequent monitoring for side effects.

Side effects of Phentermine

Side effects from Phentermine diet pills can range from minor to severe. Some of the most common adverse effects of phentermine are listed in the lists below. Not every potential adverse effect is included in these lists. See your doctor or pharmacist for further details regarding phentermine’s potential negative effects. They can offer you advice on how to handle any side effects that seem worrisome or alarming.

Mild side effects

These Phentermine side effects may disappear in a few days or weeks. However, consult your physician or pharmacist if they worsen or don’t go away. On this list are:

  • Dry mouth
  • Sleep problems
  • Dizziness 
  • Heart palpitations
  • Skin flushing
  • Fatigue 
  • Constipation 
  • Irritability 
  • Nausea 
  • Vomiting 

Serious side effects

These side effects of Phentermine are uncommon. On the other hand, if left untreated, these can be deadly. Notify your doctor straight away if you have any intolerable side effects while taking this medicine. On this list are:

  • Shortness of breath
  • Heart palpitations (fast, fluttering heartbeat)
  • Cyanosis (bluish color to your lips and skin)
  • Edema (swelling of your legs and ankles)
  • Angin  (chest pain)
  • Lightheadedness or fainting
  • Arrhythmia (irregular heartbeat)
  • Heart murmur
  • Hypertension
  • Restlessness
  • Tremors 
  • Insomnia
  • Erectile dysfunction in men

Precautions for taking Phentermine

  • Inform your doctor of any allergies you may have before getting prescribed phentermine online. Inactive chemicals in this medication may cause allergic responses such as rash, itching, swelling (particularly of the face, tongue, and neck), extreme dizziness, and difficulty breathing.
  • Inform your doctor before getting a prescription for phentermine online if you have ever had any of the following conditions, in particular: diabetes, hypertension, glaucoma, depression, heart disease, drug or alcohol addiction, stroke, pulmonary hypertension, overactive thyroid, kidney illness, or seizures.
  • This medicine may induce blurred vision, vertigo, and in rare cases, sleepiness. Before you can safely drive, operate machinery, or perform any other task requiring acute awareness or sharp vision, refrain from doing so. 
  • If you have diabetes, follow your doctor’s instructions and check your blood sugar frequently. If you purchase Phentermine online for diabetes, your doctor might need to change the way you take your medication.
  • Your online weight loss Phentermine may contain aspartame if you’re taking pills that dissolve in the tongue. Consult your physician or pharmacist about the safe usage of this medication if you have phenylketonuria or any other illness that requires you to exclude aspartame from your diet.
  • Older people’s kidneys may not function as well as they once did. This can cause the body to metabolize medications more slowly, resulting in dangerous side effects. The doctor may begin with a lower dose or a different dosing plan. This can help keep the amounts of this medicine from becoming too high in your body.
  • It has not been proven that this medicine is safe and effective in children under the age of 16. It should not be used on youngsters of this age.

Phentermine interactions

Phentermine may interfere with other medications, herbs, or supplements you are currently using. A drug interaction can alter the way your prescription works or put you at risk for dangerous adverse effects. Inform your doctor about any drugs, supplements, or herbs you’re taking to avoid interactions.  All of your prescriptions should be properly managed by your doctor. The following are some examples of medicines that can interact with phentermine.

  • Other appetite-suppressant drugs
  • MAO inhibitors 
  •  High blood pressure medicine
  • Phenothiazines
  • Other stimulants
  • Opioid pain or cough relievers
  • Drugs for sleep or anxiety
  • Muscle relaxants 
  • Antihistamines
  • Caffeine, alcohol, and marijuana

If you miss a dose

Take your medication as soon as you recall. Take only one dose if you remember just a few hours before your next scheduled dose. Never attempt to catch up by taking two doses at the same time. This could have dangerous consequences.

If you take too much

Taking this drug in a higher amount than prescribed can result in dangerous overdose adverse effects. Restlessness, tremors, disorientation, rapid breathing, hallucinations, arrhythmia, hypertension, heart palpitations, nausea, vomiting, and diarrhea are among the side effects. If you have any of these symptoms, contact your doctor immediately or your local poison control center.

If stop taking is suddenly

If you stop using this drug abruptly, you may experience withdrawal symptoms. To help prevent withdrawal, your doctor may gradually reduce your dose. If you have used phentermine for a long period or in heavy doses, you are more prone to have withdrawal symptoms.

Phentermine during pregnancy

Phentermine is classified as a category X pregnancy medication. That is, it should never be used while pregnant. While using this medication, women of reproductive age should utilize a reliable birth control method. If you become pregnant while using phentermine, stop taking it immediately and contact your doctor.

Phentermine during breastfeeding

It is unknown whether phentermine can transfer into breast milk. Amphetamines similar to phentermine, on the other hand, can pass into breast milk. These medications can have negative effects on a breastfed infant. The same could happen with phentermine. If you breastfeed your child, consult your doctor about the best approach to manage your weight.

Safe storage and disposal of Phentermine

Phentermine should be stored at room temperature in a tightly sealed container. Avoid storing this medication in areas where it could get wet, such as bathrooms. If you no longer need to take phentermine and have leftover medication, it’s important to dispose of it safely. This helps prevent others, including children and pets, from taking the drug by accident. It also helps keep the drug from harming the environment.


There are other drugs available to treat the same condition. Some may be better suited for you than others. Talk to your doctor about other drug options that may work for you. Some known options are: 

  • Meridia
  • Reductil
  • Slimall

#*# Frequently Asked Questions #*#

How long does Phentermine stay in your system?

Phentermine remains in your system for roughly 4 days following administration. Half of the medication leaves your system in roughly 20 hours. Many factors influence how long it takes for a medicine to exit your system. These include your age, diet, renal and liver function, and other factors.

How long does it take to start losing weight on Phentermine?

Phentermine should be prescribed as part of a weight loss plan that also includes exercise, behavior modification, and calorie restriction. Phentermine is typically used for no more than 12 weeks. The benefits of phentermine on weight loss are dependent on the dose used, as well as food, activity, and other factors.

Why am I tired on Phentermine?

Fatigue or sleepiness can happen from a lack of sleep or overstimulation; nonetheless, phentermine side effects include drowsiness, fatigue, and decreased energy levels. If you experience weariness or a lack of energy while taking phentermine and the problem persists, you should see your doctor since you may have an undetected medical condition.

Does phentermine cause different side effects in females and males?

Not usually. The adverse effects of phentermine are not usually different between men and women. However, phentermine can occasionally create sexual adverse effects that differ between men and women. Phentermine, for example, can occasionally cause erectile dysfunction in men.

Is phentermine similar to Adderall? 

Adderall and phentermine have a connection. It isn’t used to treat ADHD, though. Doctors rarely prescribe it off-label for this purpose, and the Food and Drug Administration (FDA) has not approved it for usage for this purpose. It’s unclear if it works well for ADHD because it hasn’t been examined in this regard.

Why is Phentermine a controlled substance?

Like amphetamine in chemical makeup, phentermine is a stimulant that is only available with a prescription and is classified as a controlled medication due to the possibility of misuse and dependence. However, phentermine has less potential for abuse and dependence than other stimulants like amphetamine, methylphenidate, or narcotics. For this reason, it is classified as a Schedule 4 prohibited substance rather than a higher schedule class like Schedule 2 or 3.