Scientific combination therapy strategy: In-depth analysis of the advantages of compound preparations and ideal personalized antihypertensive regimens for hypertension

33. What are the advantages of compound preparations? The main advantages of compound preparations are that the several components in the preparation have complementary effects, are relatively inexpensive, and are convenient to take. Taking Hyzaar as an example, the angiotensin II receptor antagonist losartan and the diuretic hydrochlorothiazide are combined in a reasonable way. First, the diuretic activates the renin-angiotensin system, allowing the angiotensin II receptor antagonist to exert its effect better; second, losartan inhibits the reabsorption of uric acid, which can compensate for the deficiency of diuretics in increasing uric acid; at the same time, in terms of electrolyte balance, the potassium-sparing effect of the angiotensin II receptor antagonist and the potassium-excreting effect of the diuretic are well complementary.

34. What is the ideal antihypertensive drug and how to choose it? Seeing so many antihypertensive drugs, you must be wondering: what kind of drug is the most ideal? The ideal antihypertensive drug should strive to meet the following standards: (1) Stable blood pressure reduction over 24 hours, maintaining good organ blood perfusion. (2) Ability to prevent and reverse target organ damage, reducing complications. (3) Improve overall health, ensure quality of life, and not cause metabolic disorders. (4) No obvious adverse reactions. After understanding what the ideal antihypertensive drug is, you will find that most modern antihypertensive drugs meet this principle, but choosing among these 6 types of drugs is still a difficult problem. So, what are the principles for prioritizing which drug? The choice of antihypertensive drug mainly depends on the drug's antihypertensive effect and adverse reactions. For each patient, a drug that can effectively control blood pressure and is suitable for long-term treatment is a reasonable choice. The selection of antihypertensive drugs should be based on the duration of the disease, the severity of the condition, cardiovascular status, target organ damage, and whether there are metabolic abnormalities, complications, or diseases such as diabetes, blood lipids, and uric acid. To improve the effectiveness of antihypertensive medication, reduce complications, and enhance quality of life, it's important to be aware of interactions between antihypertensive drugs and other medications. Simultaneously, consider the patient's financial capacity and the availability of medication. Now you understand why your doctor prescribed a certain medication. It certainly does more than just lower blood pressure; it offers numerous other benefits. So, be sure to take it consistently!

35. What are the benefits of combination therapy? In recent years, new antihypertensive drugs have emerged continuously, and their therapeutic effects have been gradually improving. Commonly used drugs include calcium channel blockers, angiotensin-converting enzyme inhibitors (ACEIs), beta-blockers, alpha-blockers, angiotensin II receptor antagonists, diuretics, and compound preparations. According to a survey of hospital prescriptions, single-dose antihypertensive drugs account for only 30% to 40% of the total prescriptions; most are combined. Combination therapy can reduce the dosage of single drugs and improve patient tolerance and compliance. If single-drug therapy is ineffective, the dosage must be increased, which increases the risk of adverse reactions. Furthermore, for some drugs, the increased risk of adverse reactions outweighs the increased benefit of the antihypertensive effect with increased dosage, meaning the risk/benefit ratio of the drug turns unfavorable. Combination therapy can avoid this dilemma. Combination therapy can also allow different drugs to complement each other, potentially reducing or offsetting certain adverse reactions. It is difficult to completely avoid adverse reactions with any medication during long-term treatment. For example, beta-blockers can slow the heart rate, and calcium channel blockers can cause ankle edema and increased heart rate. These adverse reactions can potentially be corrected or eliminated by choosing appropriate combination therapies. The purpose of combination therapy is to leverage the potential synergistic effect between drugs (i.e., achieving a 1+1>2 effect), while minimizing the mutual cancellation of adverse reactions. Therefore, the advantages of combination therapy are: better antihypertensive effect and relatively fewer adverse reactions compared to simply increasing the dose of a single drug.

36. What are some common combination drug regimens? Combining drugs can lead to complex interactions in pharmacology, pharmacodynamics, and pharmacokinetics. Therefore, it is not possible to achieve good results by taking two or three antihypertensive drugs together indiscriminately. If possible, consult a specialist to determine the treatment plan. Common combination drug regimens include the following: (1) Diuretics plus ACEI or angiotensin II receptor antagonists. (2) Diuretics plus β-blockers or α1-blockers. β-blockers can counteract the sympathetic nerve excitation and increased heart rate caused by diuretics, while thiazide diuretics can eliminate the renal natriuretic effect of β-blockers or α1-blockers. In addition, in terms of vasomotor effects, thiazide diuretics can enhance the vasodilatory effect of α1-blockers and counteract the vasoconstrictive effect of β-blockers. (3) Calcium channel blockers (CCBs) plus ACEIs. The former has a direct arterial dilation effect, while the latter dilates both arteries and veins by blocking the renin-angiotensin system and reducing sympathetic activity. Therefore, the two drugs have a synergistic antihypertensive effect in vasodilation. Ankle edema, which is commonly caused by dihydropyridine calcium channel blockers (CCBs), can be eliminated by ACEIs. The two drugs also have synergistic effects in cardiorenal and vascular protection, as well as in antiproliferation and reducing proteinuria. In addition, ACEIs can block the adverse reactions of CCBs, such as reflex sympathetic tone increase and heart rate acceleration. (4) Dihydropyridine calcium channel blockers plus β-blockers. The former has the effect of dilating blood vessels and slightly increasing cardiac output, which precisely counteracts the vasoconstriction and cardiac output reduction effects of β-blockers. The opposite effects of the two drugs on heart rate can keep the patient's heart rate unaffected. (5) Other combined application methods. If the combination of two drugs is still ineffective, a combination of three drugs may be considered, such as a thiazide diuretic plus an ACEI plus a water-soluble β-blocker (such as atenolol), or a thiazide diuretic plus an ACEI plus a calcium channel blocker.