The AN 627 white pill is an immediate-release oral prescription medication containing Tramadol Hydrochloride 50 mg. Manufactured by Amneal Pharmaceuticals, it is classified as a centrally acting synthetic opioid analgesic and categorized as a Schedule IV controlled substance in the United States.
Physical Identification
Characteristic Detail
- Active Ingredient Tramadol Hydrochloride (50 mg)
- Imprint “AN” on one side, “627” on the other side (or “AN 627” on one side)
- Shape Round
- Color White
- Formulation Immediate-release tablet
- Manufacturer Amneal Pharmaceuticals
- Note: If a pill matches this physical description but you are uncertain of its authenticity, verify it with a licensed pharmacist before consumption.
Mechanism of Action
Unlike traditional opioids that act purely on opioid receptors, tramadol possesses a dual mechanism of action:
- Opioid Receptor Agonism: Tramadol and its active metabolite (desmethyltramadol, or M1) bind weakly to the opioid receptors in the central nervous system (CNS). This alters the perception of and emotional response to pain.
- Monoamine Reuptake Inhibition: Tramadol inhibits the reuptake of two key neurotransmitters: norepinephrine and serotonin (5-HT). By increasing levels of these signaling chemicals in the descending pain pathways of the spinal cord, it further dampens pain signals transmitted to the brain.
Dosage & Administration
Dosing depends on the patient’s age, medical history, renal/hepatic function, and the severity of pain.
Adult Dosing (Immediate-Release)
- Standard Adult Starting Dose: 50 mg to 100 mg orally every 4 to 6 hours as needed for pain relief.
- Titration Regimen (to improve tolerability): For patients with chronic pain, therapy is often initiated at 25 mg to 50 mg daily and titrated upward by 25 mg to 50 mg increments every 3 days.
- Maximum Daily Limit:
- Healthy adults (under 75 years): 400 mg per day.
- Elderly patients (75 years and older): Maximum 300 mg per day due to reduced clearance.
Special Dosage Adjustments
- Renal Impairment: In patients with severe kidney dysfunction (creatinine clearance ), the dosing interval is extended to every 12 hours, with a maximum dose of 200 mg per day.
- Hepatic Impairment: In patients with severe liver cirrhosis, the recommended dose is 50 mg every 12 hours.
Side Effects
Common Side Effects
Most side effects are mild to moderate and tend to decrease over time as the body adjusts:
- Nausea and vomiting
- Constipation
- Dizziness and vertigo
- Somnolence (drowsiness) and fatigue
- Headache
- Dry mouth
- Excessive sweating (diaphoresis) or itching (pruritus)
Serious Side Effects
Seek emergency medical treatment immediately if any of the following occur:
- Respiratory Depression: Abnormally slow, shallow, or irregular breathing.
- Seizures: Convulsions can occur even at therapeutic doses.
- Serotonin Syndrome: Agitation, hallucinations, rapid heart rate, fever, sweating, shivering, muscle stiffness, or loss of coordination.
- Severe Allergic Reactions (Anaphylaxis): Hives, swelling of the face, lips, tongue, or throat, and difficulty breathing.
- Adrenal Insufficiency: Long-term use can cause nausea, vomiting, loss of appetite, severe fatigue, and dizziness.
Boxed Warnings & Key Precautions
FDA Black Box Warnings
- Addiction, Abuse, and Misuse: Tramadol exposes users to the risks of opioid addiction and misuse, which can lead to overdose and death.
- Life-Threatening Respiratory Depression: Serious or fatal hypoventilation can occur, especially when starting the drug or increasing the dose.
- Accidental Ingestion: Ingestion of even one tablet by a child can lead to a fatal overdose.
- Neonatal Opioid Withdrawal Syndrome: Prolonged use during pregnancy can cause life-threatening withdrawal in the newborn.
- Interaction with Alcohol & Sedatives: Concomitant use of opioids with benzodiazepines, alcohol, or other CNS depressants may result in severe sedation, respiratory depression, coma, and death.
Contraindications
Do not use the AN 627 pill if you have:
- Children under 12 years of age.
- Adolescents under 18 years of age following tonsillectomy or adenoidectomy.
- Severe bronchial asthma or unmonitored severe respiratory depression.
- Known or suspected gastrointestinal obstruction (e.g., paralytic ileus).
- Concurrent use of Monoamine Oxidase Inhibitors (MAOIs) or use within the past 14 days.
Drug Interactions
Medication Class Interaction Risk Precaution
- SSRIs / SNRIs / TCAs / Triptans Increased risk of Serotonin Syndrome Avoid combination or monitor closely under medical supervision.
- Benzodiazepines / Alcohol / Sedatives Profound CNS depression, respiratory failure, and death Strict avoidance of alcohol and non-prescribed sedatives.
- MAO Inhibitors Life-threatening toxicity, severe hyperpyrexia, and seizures Strictly contraindicated within 14 days of MAOI use.
- CYP2D6 & CYP3A4 Inhibitors (e.g., fluoxetine, erythromycin) Alters tramadol metabolism, increasing active metabolite concentration or decreasing efficacy Dosage adjustment may be required by a doctor.