Why Does Phentermine Make You Pee a Lot?
Phentermine is a widely prescribed weight loss medication that helps reduce hunger and supports weight loss. However, one side effect that many users may not be aware of is its diuretic effect, which can lead to frequent urination.
This can be confusing and worrying for people new to the medication. To understand why phentermine makes you urinate often, we need to look at how it works in the body, especially how it affects the brain and other body functions
In today’s article, we discuss the mechanisms behind phentermine’s diuretic effect and how it affects the body’s functions, particularly its impact on the brain. We also explore some tips for managing this side effect to ensure a more comfortable experience for users.
What is Phentermine?
Phentermine is a prescription drug that belongs to a class of drugs called sympathomimetic amines. It works as an appetite suppressant by stimulating the release of certain neurotransmitters in the brain, like norepinephrine which helps reduce the sensation of hunger.
Phentermine is approved for short-term use, usually up to 12 weeks, for people who are overweight or obese and can’t lose weight with just diet and exercise. It’s often part of a bigger weight loss plan that includes eating better, being more active, and getting help with habits.
Side Effects
Like other medications, phentermine also comes with some potential side effects, both common and rare. Here are some of the common side effects that may occur while taking phentermine:
- Dizziness
- Blurry vision
- Mood changes
- Insomnia
- Headaches
- Constipation
- Dry mouth
- Increased Blood Pressure
- Increased Heart Rate
These side effects are usually mild and go away on their own.
Though less common, some people might have rare side effects when taking phentermine. These can be more serious and might need quick doctor help. Some rare side effects are:
- Shortness of breath
- Chest pain
- Swelling in the legs, ankles, and feet
- Severe headaches or migraines
- Heart palpitations
- Severe mood changes or mental health issues such as anxiety and depression
- Seizures
- Uncontrollable shaking or tremors
If you experience any of the above rare side effects, it’s important to contact your provider immediately to discuss your symptoms and ensure your safety.
Phentermine and Increased Urination
When you start taking Phentermine, you might notice the increased frequency of their trips to the bathroom. This side effect is normal but can be confusing and inconvenient.
Why Does It Increase Urination?
The main reason for increased urination while on Phentermine is due to its action on the central nervous system. As a stimulant, Phentermine activates the release of neurotransmitters such as norepinephrine and dopamine. These chemicals signal a “fight or flight” response, which prepares your body for sudden physical exertion.
One of the effects of this response is an increase in blood flow and the activity of the kidneys. The enhanced kidney function results in more fluids being filtered out of the blood and excreted as urine.
Another reason is that phentermine might cause a temporary spike in blood pressure, prompting the kidneys to flush out excess fluid from the bloodstream.
Factors Contributing to Frequent Urination
Several factors can enhance the diuretic effect of Phentermine, causing you to urinate more often:
- Increased Water Intake: People may consciously or unconsciously drink more water to combat dry mouth, a common side effect of Phentermine, which can contribute to more frequent bathroom trips.
- Dietary Changes: When taking Phentermine, you might be advised to eat more fruits and vegetables, as they can help you lose water weight naturally.
- Stimulant Effect: Phentermine stimulates the central nervous system which makes the kidneys and bladder work faster to produce and release more urine.
- Temperature: Higher ambient temperatures or increased sweating can make you drink more fluids to stay hydrated, resulting in more visits to the restroom.
- Caffeine Consumption: Many weight loss regimes reduce food intake but may still allow beverages like coffee or tea that contain caffeine, a known diuretic.
How Much Should I Take?
The dosage of phentermine varies depending on the form and strength of the medication, as well as the individual’s specific medical condition. For the treatment of obesity:
- Oral capsules: For adults and children aged 17 years and older, the typical dosage ranges from 15 to 30 milligrams (mg) once a day. It is recommended to take the capsule approximately 2 hours after breakfast to achieve the best results. The use of phentermine in children 16 years and younger is not recommended.
- Disintegrating tablets: For adults and children aged 17 years and older, the standard dose is one tablet taken once a day, preferably in the morning. Similar to the capsules, use in children 16 years and younger is not advised.
Read this Mayo Clinic article if you want to learn more about Phentermine Dosage.
You should follow the dosage instructions from your doctor, as the number of doses, the time between them, and the treatment duration are customized to your medical needs.
Tips for Managing Increased Urination
If you’re experiencing frequent urination while taking Phentermine, here are a few tips you can try to manage this side effect:
- Stay Hydrated Wisely: It’s important to drink enough water but balance your fluid intake throughout the day. Try to sip small amounts throughout the day instead of drinking a lot at once. This way, you won’t make your bladder too full.
- Monitor Caffeine Intake: You should avoid or limit the consumption of caffeinated beverages like coffee, tea, and energy drinks. These drinks act as diuretics and can exacerbate the frequency of urination.
- Timing of Fluids: Avoid drinking large amounts of fluids close to bedtime. This can help you minimize nighttime trips to the bathroom and enjoy a better quality of sleep.
- Diet Adjustments: Try adding water-rich foods like fruits and veggies to stay hydrated without drinking too much liquid directly. Just watch out for salty foods—they can make you thirstier and have you reaching for more fluids.
- Monitor Medication Schedule: Follow your doctor’s instructions carefully regarding when to take Phentermine. Taking it at the optimal time can help manage side effects more effectively.
- Stay Cool: In hot weather or during exercise, you’ll naturally drink more water to stay hydrated. Try to stay cool to reduce excessive fluid intake.
Conclusion
Phentermine can be an effective tool in the treatment of obesity, but it is important to be aware of its potential side effects like frequent urination. By understanding the reasons behind increased urination and implementing strategies to manage it, you can stay comfortable and keep your quality of life while on this medication.
Always follow your doctor’s advice on dosage and monitoring, and know how to handle any side effects. This ensures you can safely and effectively use Phentermine to achieve your weight loss goals.
FAQ
Why does Phentermine lead to joint pain?
Phentermine can cause joint pain due to several reasons, including inflammation resulting from increased physical activity as you lose weight. It’s also possible that rapid weight loss can change how your body moves, putting extra pressure on your joints.
Is Increased Urination Dangerous?
Increased urination itself is generally not dangerous, but it can be inconvenient and lead to dehydration if not managed properly. Make sure to drink plenty of fluids to stay hydrated. If you also feel very thirsty, or dizzy, or notice dark urine, see a doctor as these might be signs of other health problems.
How Long Does Increased Urination Last?
The increased urination caused by Phentermine is usually temporary and may subside as your body adjusts to the medication. Most people see this side effect lessen within a few weeks. If you keep peeing a lot or it bothers you, talk to your doctor.
Resources
- Mayo Clinic. Phentermine (Oral Route) Proper Use [https://www.mayoclinic.org/drugs-supplements/phentermine-oral-route/proper-use/drg-20075169]
- GoodRx. A Guide to Phentermine Side Effects [https://www.goodrx.com/phentermine/common-side-effects]
