Comparative Pharmacology
Head-to-head clinical analysis: OBY TRIM versus PLEGINE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: OBY TRIM versus PLEGINE.
OBY-TRIM vs PLEGINE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
OBY-TRIM is a combination of phentermine, a sympathomimetic amine anorectic that stimulates the hypothalamus to release norepinephrine, suppressing appetite, and a diuretic (often a thiazide) to reduce fluid retention.
Plegine (phendimetrazine) is a sympathomimetic amine that acts as an anorectic agent. It stimulates the hypothalamus to release norepinephrine and dopamine, thereby suppressing appetite. The exact mechanism is thought to involve the release of catecholamines from presynaptic nerve terminals in the lateral hypothalamic feeding center, leading to decreased food intake.
Oral: 1 capsule (phentermine 18.75 mg / chlorpheniramine 6.25 mg) twice daily, 30 minutes before meals.
25-50 mg orally once daily at bedtime, maximum 100 mg/day.
None Documented
None Documented
Terminal half-life is approximately 20–30 hours in adults with normal renal function. This allows for once-daily dosing in most patients.
Terminal elimination half-life: 4–8 hours (mean 6 hours). Clinical context: Steady-state achieved after 24–48 hours of repeated dosing.
Primarily renal (90% as unchanged drug and metabolites), with about 10% biliary/fecal. In an acidic urine, elimination half-life increases.
Renal: 40% unchanged; Hepatic metabolism: 60% (biliary/fecal elimination of metabolites).
Category C
Category C
Anorexiant
Anorexiant