Lotensin HCT is a prescription combination medication used to treat high blood pressure, also called hypertension.
It contains two active ingredients that work together to lower blood pressure. Benazepril is an angiotensin-converting enzyme (ACE) inhibitor that helps relax blood vessels, while hydrochlorothiazide is a thiazide diuretic that helps the kidneys remove excess sodium and water through urine.
Although Lotensin HCT can help control blood pressure and reduce the risk of cardiovascular complications, it may cause serious side effects in certain patients.
Before starting treatment, tell your healthcare provider about your medical history, allergies, kidney and liver conditions, and all medications you currently take.
Pregnancy and Risk of Harm to an Unborn Baby
Lotensin HCT must not be used during pregnancy because it can cause serious harm or death to a developing baby.
Benazepril affects the renin-angiotensin system, which helps regulate blood pressure, fluid balance, and kidney function.
This system also plays an important role in fetal kidney development.
Exposure to medications that affect the renin-angiotensin system, particularly during the second and third trimesters of pregnancy, can interfere with the development and function of a baby’s kidneys.
Possible complications include reduced fetal kidney function, decreased amniotic fluid, abnormal lung development, skeletal abnormalities, and fetal or newborn death.
Amniotic fluid is the liquid that surrounds and protects a developing baby during pregnancy.
Very low amniotic fluid levels can interfere with normal fetal growth and development.
If you become pregnant while taking Lotensin HCT, stop taking the medication and contact your healthcare provider immediately.
Your healthcare provider will recommend an alternative blood pressure treatment that is appropriate during pregnancy.
If you are planning to become pregnant, discuss your medication options with your healthcare provider before conception.
The official prescribing information includes a boxed warning about fetal toxicity.
Angioedema (Severe Swelling)
Lotensin HCT may cause a serious reaction called angioedema.
Angioedema is sudden swelling that develops beneath the skin or in deeper tissues.
It commonly affects the face, lips, tongue, throat, or other parts of the body.
Benazepril belongs to a class of medications called ACE inhibitors, which can increase the activity of a substance called bradykinin.
Bradykinin affects blood vessels and may contribute to swelling in susceptible individuals.
Angioedema can occur at any time during treatment, even after a person has taken an ACE inhibitor without problems for months or years.
Symptoms may include swelling of the lips, face, tongue, or throat, difficulty swallowing, or trouble breathing.
If swelling affects the airway, it can become life-threatening.
Lotensin HCT must not be used by patients with a history of angioedema, whether or not it was caused by a previous ACE inhibitor. This is a contraindication, not simply a precaution.
If you develop swelling of your face, tongue, or throat, stop taking Lotensin HCT and seek emergency medical attention.
Do not take another dose unless a healthcare professional has assessed the reaction and advised you on appropriate treatment.
Kidney Disease and Kidney Function
Tell your healthcare provider if you have kidney disease or reduced kidney function before taking Lotensin HCT.
The kidneys help filter waste products from the blood, regulate fluid balance, and maintain normal electrolyte levels.
Both benazepril and hydrochlorothiazide can affect kidney function.
Benazepril changes blood flow and pressure within the kidneys by blocking the effects of angiotensin II.
Hydrochlorothiazide increases the removal of sodium and water through urine.
In some patients, these effects may cause a temporary rise in blood creatinine levels or worsen existing kidney impairment.
Creatinine is a waste product measured through blood tests to help evaluate kidney function.
People with significant kidney disease may require closer monitoring or a different blood pressure medication.
Lotensin HCT must not be used in patients with anuria, a condition in which the kidneys cannot produce urine.
Your healthcare provider may recommend blood tests before and during treatment to monitor kidney function and electrolyte levels.
Contact your healthcare provider if you experience significantly reduced urination, unusual weakness, swelling, or persistent dizziness.
Renal Artery Stenosis
Lotensin HCT should be used cautiously in patients with renal artery stenosis.
Renal artery stenosis occurs when one or both arteries supplying blood to the kidneys become narrowed.
These arteries deliver oxygen-rich blood to the kidneys, allowing them to filter waste products and regulate blood pressure.
When blood flow to the kidneys becomes restricted, the kidneys may depend more heavily on the renin-angiotensin system to maintain normal filtration.
Benazepril blocks part of this system.
Although this action helps lower blood pressure, it can also reduce filtration pressure within the kidneys.
In patients with renal artery stenosis, particularly when both kidneys are affected or only one functioning kidney is present, this may cause kidney function to worsen.
Your healthcare provider may recommend checking blood creatinine and potassium levels during the first few weeks of treatment.
In some cases, treatment may need to be adjusted or discontinued if kidney function deteriorates significantly.
Tell your healthcare provider if you have ever been diagnosed with renal artery stenosis or have received treatment for narrowed kidney arteries.
Dehydration and Fluid Loss
Lotensin HCT may increase the risk of dehydration because it contains hydrochlorothiazide, a diuretic commonly called a water pill.
Hydrochlorothiazide helps the kidneys remove excess sodium and water through urine.
This action lowers blood pressure but can also cause the body to lose too much fluid.
Dehydration occurs when the body loses more fluid than it replaces.
Possible symptoms include increased thirst, dry mouth, dizziness, weakness, dark urine, and reduced urination.
The risk of dehydration may increase during hot weather, prolonged physical activity, or illness involving vomiting or diarrhea.
Dehydration can also increase the risk of low blood pressure and kidney problems while taking Lotensin HCT.
Drink fluids regularly according to your healthcare provider’s recommendations.
However, do not increase your fluid intake excessively if you have heart failure, kidney disease, or another condition requiring fluid restrictions.
If you experience persistent vomiting, severe diarrhea, or difficulty drinking enough fluids, contact your healthcare provider.
Your medication may need to be temporarily reviewed during illnesses that cause significant fluid loss.
Low Blood Pressure (Hypotension)
Lotensin HCT may sometimes lower blood pressure too much, causing a condition called hypotension.
Hypotension occurs when blood pressure falls below the level needed to maintain adequate circulation.
Possible symptoms include dizziness, lightheadedness, blurred vision, unusual weakness, or fainting.
These effects may be more noticeable when you first start treatment or after your dosage is increased.
People who are dehydrated, taking several blood pressure medications, or following strict fluid restrictions may have a greater risk of developing low blood pressure.
One form is orthostatic hypotension, which occurs when blood pressure drops after standing up from a sitting or lying position.
To reduce dizziness, stand up slowly and allow yourself time to regain your balance before walking.
Contact your healthcare provider if you experience frequent dizziness or unusually low blood pressure readings.
Seek urgent medical attention if you faint, develop severe weakness, or experience symptoms suggesting dangerously low blood pressure.
Electrolyte Imbalances
Lotensin HCT may affect the levels of important minerals in your blood, including sodium and potassium.
These minerals are called electrolytes. They help regulate fluid balance, nerve activity, muscle contractions, and normal heart function.
Hydrochlorothiazide may cause the body to lose excessive amounts of sodium or potassium through urine.
Benazepril, on the other hand, may increase potassium levels by reducing aldosterone activity.
Because the two ingredients affect potassium differently, blood potassium levels may become too high or too low depending on your kidney function, other medications, and overall health.
Symptoms of electrolyte imbalances may include muscle cramps, weakness, unusual fatigue, nausea, or irregular heartbeats.
Severe electrolyte disturbances can be dangerous.
Your healthcare provider may recommend regular blood tests to monitor potassium, sodium, and kidney function.
Do not take potassium supplements or potassium-containing salt substitutes unless your healthcare provider recommends them.
Liver Disease and Liver Function
Tell your healthcare provider if you have liver disease or a history of liver problems before taking Lotensin HCT.
The liver plays an important role in processing medications and maintaining normal metabolic functions.
Patients with significant liver impairment may be more sensitive to changes in fluid and electrolyte balance caused by hydrochlorothiazide.
These changes can be particularly concerning in patients with advanced liver disease.
In addition, rare cases of serious liver injury have been associated with ACE inhibitors, including benazepril.
Possible warning signs include unusual fatigue, persistent nausea, loss of appetite, dark urine, abdominal pain, and yellowing of the skin or eyes.
Yellowing of the skin or eyes is called jaundice and may indicate liver dysfunction.
Your healthcare provider may recommend additional monitoring if you have a history of liver disease.
Stop taking Lotensin HCT and seek prompt medical evaluation if you develop jaundice or other symptoms suggesting serious liver injury.
Use in Older Adults
Older adults may be more sensitive to certain effects of Lotensin HCT.
As people age, kidney function may gradually decline, and the body may become less efficient at maintaining normal fluid and electrolyte balance.
Older adults are also more likely to take several medications for different medical conditions.
These factors may increase the risk of dizziness, dehydration, electrolyte disturbances, and changes in kidney function.
Some patients may experience orthostatic hypotension, which causes blood pressure to decrease when standing.
This may increase the risk of falls, particularly in people with balance problems or reduced mobility.
Your healthcare provider may recommend starting with an appropriate dose and monitoring your blood pressure, kidney function, and electrolyte levels.
Do not change your Lotensin HCT dose based on age alone. Your healthcare provider will determine whether adjustments are necessary.
Medication Interactions With Lotensin HCT
Lotensin HCT may interact with other medications and supplements.
Some interactions may increase the risk of low blood pressure, kidney problems, or abnormal electrolyte levels.
Important medications include:
- Potassium Supplements and Potassium-Sparing Diuretics: Medications such as spironolactone, amiloride, and triamterene may increase the risk of high potassium levels.
- Nonsteroidal Anti-Inflammatory Drugs (NSAIDs): Medications such as ibuprofen and naproxen may reduce blood pressure control and increase the risk of kidney problems, particularly in dehydrated patients.
- Lithium: Lotensin HCT may increase lithium concentrations, raising the risk of toxicity.
- Other Blood Pressure Medications: Taking several medications that lower blood pressure may increase the risk of dizziness or hypotension.
- Cholestyramine and Colestipol: These cholesterol-lowering medications may reduce hydrochlorothiazide absorption.
- Aliskiren: This medication must not be combined with Lotensin HCT in patients with diabetes because of increased risks involving kidney function, blood pressure, and potassium levels.
Lotensin HCT must also not be taken together with medications containing a neprilysin inhibitor, such as sacubitril/valsartan, because of the increased risk of angioedema.
A separation period of at least 36 hours is required when switching between these treatments.
Tell your healthcare provider about all prescription medications, over-the-counter drugs, vitamins, herbal supplements, and salt substitutes you use.
Do not begin a new medication or supplement without checking for potential interactions.
Allergic Reactions and Hypersensitivity
Lotensin HCT may cause allergic reactions in some patients.
Do not take Lotensin HCT if you are allergic to benazepril, another ACE inhibitor, hydrochlorothiazide, or certain sulfonamide-derived medications.
The medication may also be unsuitable for people who have previously experienced severe allergic reactions to related drugs.
Possible symptoms include itching, hives, a skin rash, or swelling.
Severe reactions may cause difficulty breathing, swelling of the tongue or throat, or a sudden drop in blood pressure.
Tell your healthcare provider if you have a history of medication allergies or bronchial asthma, as certain hypersensitivity reactions may be more likely.
Stop taking Lotensin HCT and seek emergency medical attention if you experience difficulty breathing, swelling of the face or throat, or other symptoms of a severe allergic reaction.
Blood Pressure Monitoring and Treatment Effectiveness
Lotensin HCT may not adequately control blood pressure in every patient.
The response to treatment depends on factors such as the severity of hypertension, kidney function, other medical conditions, and the medications being used.
Some patients may require a dosage adjustment or an additional blood pressure medication to reach their recommended target.
Others may experience side effects that make a different treatment more appropriate.
Your healthcare provider may recommend measuring your blood pressure regularly at home.
Keeping a record of your readings can help determine whether treatment is working.
Do not increase your dose or take extra tablets if your blood pressure remains high.
Contact your healthcare provider if your readings consistently remain above the target they have recommended.
Because high blood pressure usually causes no noticeable symptoms, continue taking Lotensin HCT even if you feel well.
When to Seek Medical Attention
Contact your healthcare provider if you experience persistent dizziness, excessive thirst, unusual weakness, muscle cramps, reduced urination, or worsening swelling.
These symptoms may indicate dehydration, low blood pressure, electrolyte disturbances, or kidney problems.
Seek prompt medical attention if you develop yellowing of the skin or eyes, persistent vomiting or diarrhea, or other symptoms suggesting a serious complication.
Seek emergency medical attention if you experience swelling of the face, tongue, or throat, difficulty breathing, severe chest pain, or signs of a stroke.
Stroke symptoms may include sudden weakness on one side of the body, difficulty speaking, facial drooping, or sudden vision changes.
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