Author: Andrew Parker, MD
Andrew Parker, MD
Dr. Andrew Parker is a board-certified internal medicine physician with over 10 years of clinical experience. He earned his medical degree from the University of California, San Francisco (UCSF), and has worked at leading hospitals including St. Mary’s Medical Center. Dr. Parker specializes in patient education and digital health communication. He now focuses on creating clear, accessible, and evidence-based medical content for the public.
Comprehensive Guide to Rifaximin: Uses, Dosage, Side Effects, and More 1. What is Rifaximin? Rifaximin is a non-systemic, broad-spectrum antibiotic that inhibits bacterial RNA synthesis by binding to the beta-subunit of bacterial DNA-dependent RNA polymerase. This medication is primarily used to treat gastrointestinal infections and hepatic encephalopathy, offering localized action with minimal systemic absorption. 2. Overview of Rifaximin Generic Name Rifaximin Brand Name Xifaxan, generics Drug Group Rifamycin antibiotic Commonly Used For This medication is used to: Treat traveler’s diarrhea. Manage hepatic encephalopathy. Reduce recurrence of irritable bowel syndrome with diarrhea (IBS-D). Key Characteristics Form: Oral tablets (200 mg, 550…
Comprehensive Guide to Reserpine: Uses, Dosage, Side Effects, and More 1. What is Reserpine? Reserpine is an antihypertensive alkaloid derived from the Rauwolfia plant, which depletes catecholamine stores (e.g., norepinephrine) in nerve terminals, lowering blood pressure and calming the central nervous system. This medication has a historical role in managing hypertension and psychiatric conditions, though its use has declined with modern therapies. 2. Overview of Reserpine Generic Name Reserpine Brand Name Serpalan, Reserpine (generic), formerly marketed as Rau-Sed Drug Group Antihypertensive (adrenergic neuron blocker) Commonly Used For This medication is used to: Treat hypertension. Manage mild psychiatric disorders. Control high…
Comprehensive Guide to Repaglinide: Uses, Dosage, Side Effects, and More 1. What is Repaglinide? Repaglinide is a meglitinide-class oral antidiabetic agent that stimulates insulin release from pancreatic beta cells by closing ATP-sensitive potassium channels. This medication is used to manage type 2 diabetes mellitus (T2DM), offering rapid-acting glycemic control, particularly in meal-related glucose spikes. 2. Overview of Repaglinide Generic Name Repaglinide Brand Name Prandin, generics Drug Group Meglitinide (antidiabetic) Commonly Used For This medication is used to: Control type 2 diabetes mellitus (T2DM). Manage postprandial hyperglycemia. Improve glycemic control in combination therapy. Key Characteristics Form: Oral tablets (0.5 mg, 1…
Comprehensive Guide to Remdesivir: Uses, Dosage, Side Effects, and More 1. What is Remdesivir? Remdesivir is a broad-spectrum antiviral medication that inhibits viral RNA polymerase, primarily used to treat severe COVID-19 and other viral infections. This medication has gained prominence for its role in managing hospitalized patients with respiratory complications, administered under medical supervision. 2. Overview of Remdesivir Generic Name Remdesivir Brand Name Veklury, generics Drug Group Nucleoside analog (antiviral) Commonly Used For This medication is used to: Treat severe COVID-19. Manage hospitalized patients with viral pneumonia. Address emerging viral infections. Key Characteristics Form: Lyophilized powder or solution for IV…
Comprehensive Guide to Regorafenib: Uses, Dosage, Side Effects, and More 1. What is Regorafenib? Regorafenib is a multi-kinase inhibitor that targets vascular endothelial growth factor receptors (VEGFR), platelet-derived growth factor receptors (PDGFR), and other tyrosine kinases, used to treat advanced cancers. This medication is a critical therapy for patients with metastatic disease, administered under specialized oncology care. 2. Overview of Regorafenib Generic Name Regorafenib Brand Name Stivarga, generics Drug Group Multi-kinase inhibitor (antineoplastic) Commonly Used For This medication is used to: Treat metastatic colorectal cancer (mCRC). Manage hepatocellular carcinoma (HCC). Control gastrointestinal stromal tumors (GIST). Key Characteristics Form: Oral tablets…
Comprehensive Guide to Rasagiline: Uses, Dosage, Side Effects, and More 1. What is Rasagiline? Rasagiline is a selective monoamine oxidase type B (MAO-B) inhibitor that increases dopamine levels in the brain by preventing its breakdown, primarily used to treat Parkinson’s disease. This medication helps manage motor symptoms and is often employed in early or advanced stages of the condition under neurological supervision. 2. Overview of Rasagiline Generic Name Rasagiline Brand Name Azilect, generics Drug Group MAO-B inhibitor (antiparkinsonian) Commonly Used For This medication is used to: Treat Parkinson’s disease. Manage motor symptoms in early and advanced stages. Improve quality of…
Comprehensive Guide to Ranibizumab: Uses, Dosage, Side Effects, and More What is Ranibizumab? Ranibizumab is a recombinant humanized monoclonal antibody fragment that inhibits vascular endothelial growth factor A (VEGF-A), used to treat various retinal disorders by reducing abnormal blood vessel growth and leakage. This medication is administered via intravitreal injection, offering a targeted approach to preserve vision. Overview of Ranibizumab Generic Name: Ranibizumab Brand Name: Lucentis, generics Drug Group: Anti-VEGF agent (ophthalmic) Commonly Used For Treat neovascular (wet) age-related macular degeneration (AMD). Manage diabetic macular edema (DME). Address retinal vein occlusion (RVO). Key Characteristics Form: Solution for intravitreal injection (0.5…
Comprehensive Guide to Ramipril: Uses, Dosage, Side Effects, and More What is Ramipril? Ramipril is an angiotensin-converting enzyme (ACE) inhibitor that reduces blood pressure and protects the heart and kidneys by blocking the conversion of angiotensin I to angiotensin II. This medication is widely used to manage hypertension, heart failure, and other cardiovascular conditions, improving patient outcomes with long-term therapy. Overview of Ramipril Generic Name: Ramipril Brand Name: Altace, generics Drug Group: ACE inhibitor (antihypertensive) Commonly Used For Treat hypertension (high blood pressure). Manage heart failure post-myocardial infarction. Prevent cardiovascular events in at-risk patients. Key Characteristics Form: Oral capsules (1.25…
Comprehensive Guide to Raltegravir: Uses, Dosage, Side Effects, and More What is Raltegravir? Raltegravir is an integrase strand transfer inhibitor (INSTI) that blocks the integration of HIV-1 DNA into host DNA, preventing viral replication. This medication is a cornerstone in antiretroviral therapy (ART) for both treatment-naïve and treatment-experienced patients, administered under medical supervision. Overview of Raltegravir Generic Name: Raltegravir Brand Name: Isentress, Isentress HD, generics Drug Group: Integrase strand transfer inhibitor (INSTI, antiretroviral) Commonly Used For Treat HIV-1 infection in adults and children. Manage HIV in treatment-naïve and -experienced patients. Support viral suppression in ART regimens. Key Characteristics Form: Film-coated…
Comprehensive Guide to Raloxifene: Uses, Dosage, Side Effects, and More What is Raloxifene? Raloxifene is a selective estrogen receptor modulator (SERM) that mimics estrogen’s beneficial effects on bone while acting as an anti-estrogen in breast and uterine tissues. This medication is primarily used to prevent and treat osteoporosis in postmenopausal women and to reduce breast cancer risk in high-risk individuals. Overview of Raloxifene Generic Name: Raloxifene Brand Name: Evista, generics Drug Group: Selective estrogen receptor modulator (SERM) Commonly Used For Prevent and treat postmenopausal osteoporosis. Reduce the risk of invasive breast cancer in postmenopausal women. Manage bone health in at-risk…