Ionamin User Reviews for Weight Loss BySally Cohen Updated onJune 8, 2023 Ionamin (phentermine resin) is a brand of phentermine that is no longer available in the United States ( 1 ). Keep scrolling to read about past patients’ experiences and results with Ionamin diet pills.3.2 / 5 Reviewer {{ reviewsOverall }} / 5 (5 votes) UsersPros Ionamin contained phentermine resin, unlike other pills that contain phentermine hydrochloride. Ionamin was manufactured as slow-release capsules, which allowed users to benefit from the medication’s effects later into the day. This brand was available in two different doses: 15mg and 30mg.Cons Ionmain is no longer sold in the US. This brand was only available as capsules (no tablets).SummaryOverall, users give this brand of phentermine about 3 out of 5 stars. Patients liked that it helped them lose weight quickly, but many reported weight re-gain after stopping the medication.EffectivenessEase of useSatisfaction What people say Leave your rating Order by: Most recentTop scoreMost helpfulWorst score Be the first to leave a review. Verified / 5 {{{ review.rating_title }}}{{{review.rating_comment | nl2br}}}Show more {{ pageNumber+1 }}Leave your rating EffectivenessEase of useSatisfaction Back to All ReviewsReferencesDrugs.com. (2018, July 2). Ionamin – FDA prescribing information, side effects and uses.