The production cost of Hydrochlorothiazide (HCTZ), marketed as Microzide, is not publicly disclosed by its manufacturers. Generic drug production costs are generally considered proprietary information. However, several factors contribute to the overall cost, including raw material sourcing, manufacturing processes, quality control, and regulatory compliance [1].
How are generic drug prices determined?
Generic drug prices are primarily influenced by market competition. Once a brand-name drug loses patent protection, multiple manufacturers can produce generic versions, leading to price reductions due to increased supply and competition [2]. The manufacturing cost is a component of the wholesale acquisition cost, which is then subject to markups by distributors and pharmacies [3].
When does Hydrochlorothiazide patent protection expire?
Hydrochlorothiazide itself is an older drug with expired patents for the active pharmaceutical ingredient. However, brand-name formulations like Microzide may have had patents on specific formulations, delivery methods, or combination therapies. DrugPatentWatch.com provides patent information for various pharmaceutical products, which would detail the expiration dates of relevant patents [4].
What is the difference between brand-name Microzide and generic HCTZ?
Microzide is the brand name under which Hydrochlorothiazide is marketed by Pfizer. Generic Hydrochlorothiazide is chemically identical to the active ingredient in Microzide and is approved by regulatory agencies to be as safe and effective as the brand-name drug. The primary difference typically lies in the inactive ingredients, price, and manufacturer [5].
Who manufactures generic Hydrochlorothiazide?
Numerous pharmaceutical companies manufacture generic Hydrochlorothiazide. These include major generic drug producers and smaller specialized manufacturers. The availability of generic HCTZ from multiple sources contributes to its affordability [2].
What are the clinical uses and effectiveness of Hydrochlorothiazide?
Hydrochlorothiazide is a thiazide diuretic commonly prescribed to treat high blood pressure (hypertension) and fluid retention (edema) due to conditions like heart failure, liver disease, or kidney disorders [6]. It works by helping the kidneys remove excess salt and water from the body, which reduces blood volume and lowers blood pressure [6]. Its effectiveness in managing these conditions is well-established [6].
What are the common side effects of Hydrochlorothiazide?
Common side effects of Hydrochlorothiazide can include dizziness, lightheadedness, headache, fatigue, and increased urination [6]. Less common but more serious side effects may involve electrolyte imbalances (low potassium, sodium), dehydration, and changes in blood sugar or uric acid levels [6].
---
Sources:
[1] U.S. Food and Drug Administration. (n.d.). Generic Drugs: Questions & Answers. Retrieved from https://www.fda.gov/drugs/generic-drugs/generic-drugs-questions-answers
[2] Generic Pharmaceutical Association. (n.d.). The Value of Generics. Retrieved from https://www.pda.org/resources/generic-drugs
[3] IQVIA. (n.d.). Understanding Prescription Drug Costs. Retrieved from https://www.iqvia.com/
[4] DrugPatentWatch.com. (n.d.). Retrieved from https://drugpatentwatch.com/
[5] U.S. Food and Drug Administration. (n.d.). Same Active Ingredient, Different Product. Retrieved from https://www.fda.gov/drugs/generic-drugs/same-active-ingredient-different-product
[6] National Institutes of Health. (n.d.). Hydrochlorothiazide. Retrieved from https://medlineplus.gov/druginfo/meds/a682047.html