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 Cyanocobalamin (Vitamin B12): Uses, Dosage, Side Effects, and More What is Cyanocobalamin (Vitamin B12)? Cyanocobalamin is a synthetic form of Vitamin B12, a water-soluble vitamin essential for red blood cell formation, neurological function, and DNA synthesis. This medication is used to treat and prevent Vitamin B12 deficiency, supporting overall health in various conditions. Overview of Cyanocobalamin Generic Name: Cyanocobalamin Brand Name: Nascobal, Dodex Drug Group: Vitamin B12 supplement Commonly Used For Treat Vitamin B12 deficiency. Prevent pernicious anemia. Support neurological health. Key Characteristics Form: Oral tablets (50 mcg, 100 mcg, 1000 mcg), sublingual tablets, nasal spray (500…
Comprehensive Guide to Cyclophosphamide: Uses, Dosage, Side Effects, and More What is Cyclophosphamide? Cyclophosphamide is an alkylating agent chemotherapy drug that cross-links DNA, used to treat various cancers and autoimmune diseases. This medication inhibits cancer cell proliferation and modulates immune responses, making it a versatile therapeutic option. Overview of Cyclophosphamide Generic Name: Cyclophosphamide Brand Name: Cytoxan, Neosar Drug Group: Alkylating agent Commonly Used For Treat lymphomas. Manage leukemias. Control autoimmune conditions. Key Characteristics Form: Oral tablets (25 mg, 50 mg), injectable powder for reconstitution (500 mg, 1 g, 2 g vials) (detailed in Dosage section). Mechanism: Cross-links DNA strands, preventing…
Comprehensive Guide to Crizotinib: Uses, Dosage, Side Effects, and More What is Crizotinib? Crizotinib is a tyrosine kinase inhibitor that targets ALK, ROS1, and MET, used to treat specific types of advanced cancers, particularly non-small cell lung cancer (NSCLC). This medication inhibits abnormal kinase activity, offering a targeted therapy for patients with specific genetic mutations. Overview of Crizotinib Generic Name: Crizotinib Brand Name: Xalkori Drug Group: Tyrosine kinase inhibitor (TKI) Commonly Used For Treat ALK-positive NSCLC. Manage ROS1-positive NSCLC. Control metastatic lung cancer. Key Characteristics Form: Oral capsules (200 mg, 250 mg) (detailed in Dosage section). Mechanism: Inhibits ALK, ROS1,…
Comprehensive Guide to Ciprofloxacin: Uses, Dosage, Side Effects, and More What is Ciprofloxacin? Ciprofloxacin is a broad-spectrum fluoroquinolone antibiotic used to treat a variety of bacterial infections, including urinary tract infections, respiratory infections, and skin infections. By inhibiting bacterial DNA gyrase and topoisomerase IV, this drug prevents bacterial DNA replication, effectively killing susceptible bacteria. Marketed under brand names like Cipro and Cipro XR, the medication is available in oral, intravenous, and topical forms and is valued for its efficacy against Gram-negative and some Gram-positive bacteria. The antibiotic’s benefits include rapid action and broad coverage, but it carries significant risks of…
Comprehensive Guide to Caffeine: Uses, Dosage, Side Effects, and More What is Caffeine? Caffeine is a central nervous system stimulant found naturally in coffee, tea, and cocoa, and synthesized for medical use. This medication enhances alertness, reduces fatigue, and is employed therapeutically for conditions like apnea of prematurity and as an adjunct in pain management, acting by blocking adenosine receptors. Overview of Caffeine Generic Name: Caffeine Brand Name: NoDoz, Vivarin, Cafcit, generics Drug Group: Stimulant/Methylxanthine Commonly Used For Treat apnea of prematurity in neonates. Enhance alertness and reduce fatigue in adults. Manage certain types of headaches as an adjunct. Key…
Comprehensive Guide to Calcium Carbonate: Uses, Dosage, Side Effects, and More What is Calcium Carbonate? Calcium Carbonate is a calcium supplement and antacid that provides elemental calcium to support bone health and neutralize stomach acid. This medication is widely used to prevent or treat calcium deficiency, manage osteoporosis, and relieve heartburn or indigestion by raising gastric pH and aiding mineral homeostasis. Overview of Calcium Carbonate Generic Name: Calcium Carbonate Brand Name: Tums, Caltrate, Os-Cal, generics Drug Group: Calcium Supplement/Antacid Commonly Used For Treat calcium deficiency. Manage osteoporosis and bone health. Relieve heartburn and indigestion. Key Characteristics Form: Oral tablets (500…
Comprehensive Guide to Calcium Gluconate: Uses, Dosage, Side Effects, and More What is Calcium Gluconate? Calcium Gluconate is a calcium salt used to treat acute hypocalcemia and related conditions, providing bioavailable calcium to restore electrolyte balance. This medication is administered intravenously or orally to manage severe calcium deficits, cardiac arrhythmias, and magnesium toxicity, acting by increasing serum calcium levels and stabilizing cardiac membranes. Overview of Calcium Gluconate Generic Name: Calcium Gluconate Brand Name: Kalcinate, generics Drug Group: Calcium Supplement/Electrolyte Commonly Used For Treat acute hypocalcemia. Manage cardiac arrhythmias due to hypocalcemia. Reverse magnesium toxicity. Key Characteristics Form: Intravenous (IV) solution…
Comprehensive Guide to Candesartan: Uses, Dosage, Side Effects, and More What is Candesartan? Candesartan is an angiotensin II receptor blocker (ARB) that lowers blood pressure by blocking the action of angiotensin II, a hormone that constricts blood vessels. This medication is used to treat hypertension and heart failure, improving cardiovascular outcomes by reducing vascular resistance and protecting kidney function. Overview of Candesartan Generic Name: Candesartan Brand Name: Atacand, generics Drug Group: Angiotensin II Receptor Blocker (ARB) Commonly Used For Treat hypertension (high blood pressure). Manage heart failure with reduced ejection fraction. Protect renal function in certain conditions. Key Characteristics Form:…
Comprehensive Guide to Capecitabine: Uses, Dosage, Side Effects, and More What is Capecitabine? Capecitabine is an oral chemotherapy agent that converts to 5-fluorouracil (5-FU) in the body to treat various cancers. This medication inhibits DNA synthesis in cancer cells, making it effective against colorectal, breast, and gastric cancers, and is designed for convenient home administration with oncologist oversight. Overview of Capecitabine Generic Name: Capecitabine Brand Name: Xeloda, generics Drug Group: Antimetabolite/Chemotherapy Commonly Used For Treat colorectal cancer. Manage metastatic breast cancer. Address gastric cancer. Key Characteristics Form: Oral tablets (150 mg, 500 mg) (detailed in Dosage section). Mechanism: Metabolized to…
Comprehensive Guide to Caspofungin: Uses, Dosage, Side Effects, and More What is Caspofungin? Caspofungin is an echinocandin antifungal medication that inhibits the synthesis of β-(1,3)-D-glucan, a key component of fungal cell walls, used to treat invasive fungal infections. This medication is effective against Aspergillus and Candida species, offering a vital option for immunocompromised patients. Overview of Caspofungin Generic Name: Caspofungin Brand Name: Cancidas Drug Group: Echinocandin antifungal Commonly Used For Treat invasive aspergillosis. Manage candidemia. Control fungal infections in immunocompromised patients. Key Characteristics Form: Injectable powder for reconstitution (50 mg, 70 mg vials) (detailed in Dosage section). Mechanism: Inhibits β-(1,3)-D-glucan…