Phentermine K 25 is a 37.5 mg, white with blue specks, oval-shaped tablet identified as a generic version of Adipex-P. It is a prescription stimulant used for short-term weight loss in adults with obesity. It works as an appetite suppressant, typically taken once daily. 
Key Details About Phentermine K 25:
Imprint: K 25
Strength: 37.5 mg (equivalent to 30 mg base)
Color/Shape: White with blue specks, Oval
Class: Schedule IV controlled substance
Manufacturer: KVK-Tech, Inc.
Common Side Effects: Dry mouth, insomnia, headache, constipation 
Important Safety Information:
Contraindications: Do not use if you have severe hypertension, cardiovascular disease, hyperthyroidism, glaucoma, or if you are pregnant/breastfeeding.
Warnings: It should not be used with or within 14 days of MAO inhibitors.
Usage: It is intended for short-term use (usually 12 weeks or less) as part of a regimen that includes exercise and calorie reduction.