This list includes 29 Pills that start with G, from “Gabapentin” to “Guanfacine”. They include widely prescribed generics for pain, blood pressure, and mental health.
Pills that start with G are oral medications whose names begin with the letter G. Gabapentin, a widely used example, shows how one letter groups many different treatments.
Below you’ll find the table with Name, Generic/Brand, Primary use, Drug class, Common side effects, Formulation, and Sources.
Name: The pill’s official or brand name, so you can quickly spot it on labels, prescriptions, or medicine lists.
Generic/Brand: Shows whether the listing is the generic molecule or a brand; you can check equivalence and prescription labels.
Primary use: Summarizes the main medical use in one phrase, helping you match a pill to its common indication.
Drug class: Names the therapeutic class so you understand how the medicine works and which other drugs are similar.
Common side effects: Lists the most frequent side effects you may experience, so you know what to watch for.
Formulation: Notes pill form such as tablet or capsule and common strengths to help you identify what you have.
Sources: Points to the original product pages and label information so you can read full prescribing details if needed.
Pills that start with G
| Name | Generic/Brand | Primary use | Drug class & typical adult dose | Description |
|---|---|---|---|---|
| Gabapentin | Generic (Neurontin) | Nerve pain, seizures | Anticonvulsant/neuropathic pain; 300–900 mg TID | Helps nerve pain and some seizures. Common: drowsiness, dizziness, weight gain, peripheral edema. Caution with sedation, kidney dosing. Take regularly; avoid sudden stop. |
| Ganciclovir | Generic | CMV viral infections | Antiviral; oral 1,000 mg TID (induction) | Used for cytomegalovirus. Common: nausea, diarrhea, low white blood cells, headache. Caution in pregnancy and blood count monitoring. Usually used under specialist care. |
| Galantamine | Generic (Razadyne) | Mild–moderate Alzheimer disease | Cholinesterase inhibitor; 8–24 mg/day | May help memory in Alzheimer’s. Common: nausea, vomiting, diarrhea, insomnia, dizziness. Caution with heart block and asthma. Taken daily; benefits may be modest. |
| Gemfibrozil | Generic (Lopid) | High triglycerides | Fibrate lipid-lowering; 600 mg BID | Lowers triglycerides. Common: stomach upset, muscle pain, rash, liver enzyme changes. Avoid with certain statins; monitor liver. Take 30 minutes before morning and evening meals. |
| Gemifloxacin | Generic (Factive) | Bacterial respiratory infections | Fluoroquinolone antibiotic; 320 mg once daily | Treats some respiratory infections. Common: nausea, diarrhea, headache, tendon pain, dizziness. Risk of tendon rupture and QT prolongation. Short courses; avoid in pregnancy. |
| Gaviscon | Brand | Heartburn, reflux | Antacid/alginate; 1–2 chewable tablets after meals and bedtime | OTC reflux relief forming foam barrier. Common: constipation, stomach cramps, nausea. Caution if on sodium-restricted diet. Chew tablet after meals for heartburn relief. |
| Gleevec | Brand (imatinib) | Chronic myeloid leukemia, GI stromal tumors | Tyrosine kinase inhibitor; 400 mg once daily | Oral cancer medicine. Common: nausea, edema, muscle cramps, rash, fatigue. Monitor blood counts and liver. Taken daily; specialist prescribing. |
| Glipizide | Generic (Glucotrol) | Type 2 diabetes | Sulfonylurea; 2.5–20 mg daily (divided) | Lowers blood sugar by boosting insulin. Common: low blood sugar, weight gain, nausea, dizziness. Risk of hypoglycemia; caution in renal impairment. Take before meals. |
| Glimepiride | Generic (Amaryl) | Type 2 diabetes | Sulfonylurea; 1–4 mg once daily (up to 8 mg) | Lowers blood sugar. Common: hypoglycemia, weight gain, nausea, headache. Avoid missed meals; caution in elderly. Usually taken with breakfast. |
| Glyburide | Generic (DiaBeta, Glynase) | Type 2 diabetes | Sulfonylurea; 2.5–10 mg daily divided | Effective glucose-lowering. Common: hypoglycemia, weight gain, nausea, skin reactions. Higher hypoglycemia risk in elderly/renal impairment. Take with food to reduce stomach upset. |
| Glucophage | Brand (metformin) | Type 2 diabetes | Biguanide; 500 mg BID up to 2,000 mg/day | First-line diabetes pill. Common: diarrhea, nausea, abdominal pain, metallic taste. Caution in kidney disease and contrast studies. Take with meals; may help weight. |
| Glycopyrrolate | Generic (Robinul) | Reduce saliva, stomach acid | Anticholinergic; 1–2 mg TID–QID | Reduces drooling and stomach secretions. Common: dry mouth, constipation, blurred vision, urinary retention. Caution in glaucoma, enlarged prostate, elderly. Monitor side effects. |
| Guaifenesin | Generic (Mucinex) | Thins mucus, cough | Expectorant; 200–400 mg every 4 hours (or ER 600–1,200 mg) | OTC expectorant to loosen phlegm. Common: nausea, dizziness, headache, rash. Generally safe; drink fluids. Use as needed for productive cough. |
| Guanfacine | Generic (Intuniv/ Tenex) | ADHD, high blood pressure | Alpha-2 agonist; 1–4 mg once daily (ER for ADHD) | Calms ADHD symptoms and lowers BP. Common: drowsiness, dry mouth, low BP, dizziness. Titrate slowly; avoid sudden stop. Take at same time daily. |
| Granisetron | Generic (Kytril) | Prevent chemotherapy nausea | 1–2 mg/day oral antiemetic | Prevents severe nausea/vomiting. Common: headache, constipation, fatigue, dizziness. Caution with other QT‑prolonging drugs. Often given before chemo and for a short period. |
| Griseofulvin | Generic (Grifulvin V) | Fungal skin and nail infections | Antifungal; 500–1,000 mg/day (divided) | Treats ringworm and scalp/nail fungal infections. Common: headache, GI upset, photosensitivity, rash. Caution with alcohol and pregnancy. Long courses needed for nails. |
| Gabitril | Brand (tiagabine) | Focal seizures | Anticonvulsant; 4–56 mg/day divided | Helps reduce focal seizures. Common: dizziness, drowsiness, irritability, tremor. Risk of worsened seizures in some; start low and titrate. Take with food. |
| Geodon | Brand (ziprasidone) | Schizophrenia, bipolar mania | Atypical antipsychotic; 20–80 mg BID | Controls psychosis and mania. Common: sedation, dizziness, nausea, weight gain, EPS. Caution for QT prolongation; take with food for absorption. |
| Gilotrif | Brand (afatinib) | EGFR‑mutant lung cancer | Tyrosine kinase inhibitor; 40 mg once daily | Targets certain lung cancers. Common: diarrhea, rash, mouth sores, nail changes, fatigue. Specialist use; monitor liver and lung symptoms. |
| Gefitinib | Generic (Iressa) | EGFR‑positive lung cancer | Tyrosine kinase inhibitor; 250 mg once daily | Oral targeted cancer therapy. Common: diarrhea, rash, nausea, liver enzyme elevation. Specialist monitoring required. Taken daily. |
| Galvus | Brand (vildagliptin) | Type 2 diabetes | DPP‑4 inhibitor; 50 mg twice daily | Lowers blood sugar without much weight gain. Common: headache, nausea, nasopharyngitis. Caution with pancreatitis history and liver disease. Taken with/without food. |
| Gliclazide | Generic | Type 2 diabetes | Sulfonylurea; 30–120 mg/day (varies by form) | Lowers glucose by boosting insulin. Common: hypoglycemia, weight gain, nausea. Caution in elderly and renal impairment. Follow sugar-monitoring plan. |
| Glucovance | Brand (glyburide+metformin) | Type 2 diabetes | Sulfonylurea + biguanide; common 1 tablet BID (varies) | Combination pill for glucose control. Common: hypoglycemia, GI upset, weight gain. Caution for metformin and sulfonylurea risks. Dosing individualized. |
| Gas‑X | Brand (simethicone) | Gas relief | Antiflatulent; 40–125 mg after meals PRN | OTC relief for bloating and gas. Common: mild GI upset, rare allergic reaction. Generally safe; chew or swallow tablets after meals as needed. |
| Gilenya | Brand (fingolimod) | Relapsing multiple sclerosis | Sphingosine‑1 receptor modulator; 0.5 mg once daily | Reduces MS relapses. Common: headache, flu symptoms, slow heart rate, liver enzyme rise. First dose monitoring for bradycardia required. |
| Gocovri | Brand (amantadine ER) | Parkinson’s dyskinesia | Amantadine ER; 137 mg bedtime then 137 mg twice daily (total 274 mg/day) | Reduces involuntary movements in Parkinson’s. Common: hallucinations, dry mouth, dizziness, constipation. Caution in renal impairment and psychiatric history. |
| Genvoya | Brand (elvitegravir/cobicistat/emtricitabine/tenofovir alafenamide) | HIV treatment | Single‑tablet antiretroviral; 1 tablet once daily | Once‑daily HIV regimen. Common: nausea, diarrhea, headache, kidney/liver effects. Requires viral monitoring and drug‑interaction checks. Take with food. |
| Gabapentin enacarbil | Generic (Horizant) | Restless legs syndrome, nerve pain | Prodrug gabapentin; 600 mg once daily (evening) | Extended‑release gabapentin form. Common: somnolence, dizziness, nausea, fatigue. Caution driving; usually taken in evening for RLS. |
| Gemifloxacin | Generic (Factive) | Community respiratory infections | Fluoroquinolone; 320 mg once daily | Treats certain respiratory infections. Common: diarrhea, nausea, headache, tendon pain. Risk of tendon rupture and QT issues. Short course; avoid in pregnancy. |
Descriptions
Gabapentin
Ganciclovir
Galantamine
Gemfibrozil
Gemifloxacin
Gaviscon
Gleevec
Glipizide
Glimepiride
Glyburide
Glucophage
Glycopyrrolate
Guaifenesin
Guanfacine
Granisetron
Griseofulvin
Gabitril
Geodon
Gilotrif
Gefitinib
Galvus
Gliclazide
Glucovance
Gas‑X
Gilenya
Gocovri
Genvoya
Gabapentin enacarbil
Gemifloxacin