GB-115

GB-115 is a synthetic dipeptide discussed by a small nootropic and social-anxiety audience for feeling less tense without becoming foggy. Reports include easier everyday interactions, no benefit, and less anxiety accompanied by irritability. Several enthusiastic accounts involve other compounds, so they do not establish what GB-115 does alone.

What GB-115 is

• A CCK-related research peptide. GB115 and GB-115 refer to the same designation. It was developed from the structure of cholecystokinin-4, abbreviated CCK-4; its chemical shorthand is Ph(CH2)5CO-Gly-L-Trp-NH2, and the human pilot literature describes it as a blocker of central CCK receptors. Animal context Official context
• The name does not make every formulation equivalent. Kimera lists this identity as a synthetic dipeptide amide and associates it with the Ranquilon name. Its supplier material, Russian oral-product reports and community nasal sprays cannot be assumed to deliver the same exposure or quality. Community guide Reddit r/NooTopics

What people hope to notice

• Less avoidance in ordinary situations. A month-long nasal account described easier conversation, entering places and eating in public, along with less overthinking. A reply in the same thread reported no response; this is a contrast between individual experiences, not a success rate. Personal report
• Calm without emotional dulling. One nasal user reported a brighter mood while already taking Wellbutrin. That co-use matters: the account cannot establish GB-115 alone as an antidepressant or explain the combination’s safety. Reddit r/NooTopics

How people compare it

• Selank is the nearest practical comparison. One person using nasal GB-115 and NA Selank described more bodily relaxation with GB-115 and more mental calm with NA Selank. They also sometimes used bromantane and NA Semax, so this is a personal comparison under mixed conditions, not evidence of superiority or dose equivalence. Reddit r/NooTopics
• Unifiram appears in the same study-focused discussion. A Looksmax contributor credited both compounds while discussing focus, motivation and memory. That brief endorsement does not separate their contributions; it cannot establish GB-115 as a general learning enhancer. Personal report

Doses people discuss

• Nasal: one account reports 400 mcg total daily. The month-long author describes two sprays totaling 400 mcg, or 0.4 mg. That is the reported product amount, not a universal spray conversion. Personal report Reddit r/NooTopics
• Oral: 2 mg twice daily in a nonresponse account. A commenter reported three weeks with the Russian oral product at this schedule—4 mg/day in total—and stopped after no anxiety relief. The account is not a test of whether a higher amount would work. Reddit r/NooTopics
• Sublingual: a separate 6 mg/day report. In a sublingual-liquid discussion, one commenter reported benefit with 3 mg twice daily or 2 mg three times daily. Their claim of route superiority is untested. Reddit r/NooTopics

Half-life

• No reliable community estimate for nasal or sublingual use. The inspected accounts do not measure drug elimination. Their descriptions of how long effects feel noticeable cannot establish bodily half-life. The oral human measurement is explained separately below. Reddit r/NooTopics Personal report

When people notice something

• Immediate sensations and a slower baseline change are different. One nasal user described relaxation within about ten seconds of their first use, but much less noticeable benefit the next day. The month-long author noticed a change about a week in; another user said it took just under two weeks. Personal report Personal report Reddit r/NooTopics

How long the reported effects last

• Per-dose coverage remains unclear. A two-day user repeated an unverified four-hour estimate. Another reported repeating use seven hours later; that interval does not demonstrate seven hours of relief. Reddit r/NooTopics Personal report
• A lasting reset is not established. One commenter described anxiety gradually returning during two months off after two months of use. Their course does not establish elimination time. Personal report

Periods of use and breaks

• The reports do not establish an on/off standard. The one-month nasal and three-week oral accounts show different outcomes. Neither establishes an ideal course length or a proven break period. Personal report Reddit r/NooTopics
• Combination cycling stays combination evidence. A commenter in the tropisetron pairing thread described about a month of use on four days per week. Their advice to cycle to prevent tolerance was not backed by a comparison; the pattern cannot establish a GB-115-only schedule. Reddit r/NooTopics

What could make the experience worse

• Less anxiety can come with irritability. An author reporting four nasal sprays that day described reduced anxiety but snapping at friends and coworkers. Another commenter reported agitation with more sprays; calling this merely greater assertiveness would hide an adverse experience. Reddit r/NooTopics
• Nasal burning varies between reports. People in the tropisetron discussion disagreed about burning or painful throat runoff. The source does not distinguish effects of GB-115 from the liquid ingredients or delivery device. Reddit r/NooTopics
• Changing prescriptions is outside what these reports establish. The tolerance-thread author also used benzodiazepines several days weekly. These accounts do not establish safe combinations or justify replacing or reducing prescribed medication; no reliable long-term safety conclusion follows from feeling calm. Personal report

What the formal research adds

• There is human research, but the available pilot result is limited. A 2022 conference abstract reports a post-hoc analysis of 25 people with generalized anxiety disorder given 6 mg/day for 21 days, with lower anxiety and fatigue scores. It describes no concurrent placebo comparison; this formal study amount is separate from community dosing. Official context
• A reassuring small study does not cancel adverse reports. The abstract reports no stimulation-related side effects in its analyzed patients. That finding does not rule out the agitation described in nasal self-experiments or establish safety across different formulations and longer use. Official context Reddit r/NooTopics
• Measured oral half-life is a separate answer. A 2018 conference abstract reports a plasma elimination half-life of 1.0 ± 0.2 hours in healthy volunteers after a single 15 mg oral tablet dose. This is a human measurement reported alongside animal extrapolation, not a nasal half-life or the duration of anxiety relief. Official context

Community experiences in context

• Social ease and social friction both appear. In the irritability thread, commenters disagreed over whether bluntness felt freeing or disruptive. Less anxious thinking did not necessarily make interactions easier. Reddit r/NooTopics
• Early excitement can fade without proving tolerance. Replies to the first-to-second-day change proposed drug accumulation or adaptation. Neither was measured, and medication and lifestyle changes complicate the account. Personal report
• Stacks make strong praise difficult to attribute. The Looksmax study discussion names GB-115 alongside unifiram; another discussion credits a tropisetron pairing. These narrow self-experiment communities do not establish a broad consensus, and neither account isolates a GB-115 effect. Personal report Reddit r/NooTopics
• The stopping anecdote is too ambiguous to label as withdrawal. One reply in the two-drug thread described anxiety and low mood after stopping, but also an old bottle whose label was barely readable. The compound was not secure enough to treat this as a confirmed GB-115 withdrawal report. Reddit r/NooTopics