Author Year of publication Drug Sample size Study design Major results
Moskowitz [44] 1971 Haloperidol 8 case reports 8 military prisoners were sucessfully treated with haloperidol. The case description suggest that several subjects suffering from an underlying chronic psychotic disorder.
Abraham [5] 1983 Benzodiaepines, Phenothiazines 21 Observational study 8 of the 9 subjects receiving benzodiaepines reported a reduced intensity and frequency of visual disturbances, whereas 11 of 12 sujects receiving phenothiazines reported exacerbation of HPPD
Abraham and Mamen [45] 1996 Risperidone 3 Case reports 3 HPPD patients treated with risperidone reported an exacerbation of LSD – like panic and visual symptoms.
Young [40] 1997 Sertraline 1 Case report A 22 old male patient had stopped using LSD after an 8-month history of abuse. Despite his abstinence he developed HPPD. sertraline appeared to have exerbated HPPD initially, but attenuated symptoms after 1 month administration (100 mg/daily).
Lerner et al. [46] 1997 Naltrexone 2 Case reports Dramatic improvement with naltrexone (50 mg daily) was reported in two young men with LSD-induced HPPD. The remission was sustained as it was possible to discontinue the naltrexone after 2 months without precipitating a relapse.
Lerner et al. [50] 2000 Clonidine 8 Observational study 6 of the 8 subjects (2 dropped out) received clonidine (0.025 mg, three times a day) for 2 months alleviated LSD-related HPPD.
Aldurra and
Crayton [41]
2001 Olanzapine and Fluoxetine 1 Case report A 17-year-old boy with abuse of LSD weekly for 4.5 years developed HPPD after 5 months of abstinence. The patient showed a marked exacerbation in symptoms while taking risperidone and showed an attenuation of HPPD with a combination of fluoxetine and olanzapine.
Lerner et al. [48] 2002 Reboxetine 1 Case report During a 6-month follow-up period on reboxetin (6mg/day) no exacerbation of visual disturbance were reported.
Lerner et al. [42] 2003 Clonazepam 16 Observational study 16 patients received clonazepam 2mg/day for 2 months. Patients reported significant relief during the clonazepam administration. This improvement persisted during a 6 months follow-up period.
Espiard et al.
[22]
2005 Olanzapine Risperidone Sertraline 1 Case report A case of a young man presenting HPPD after a mixed intoxication with psilocybin and cannabis. Olanzapine (5mg) exacerbated symtoms and was replaced by risperidone (2mg/day) and sertraline (150 mg/day). After 6 months of this treatment HPPD disapeared.
Hermle et al.
[11]
2012 Lamotrigine 1 Case report A case of a young woman, who displayed over 13 years HPPD received a year-long tial of lamotrigine (200 mg/daily) and experienced a significant relief from her HPPD symptoms.
Abraham HD
[unpublished
data]
2012 COMT-inhibitor Tolcapone Levodopa augmentation 20 Observational study 20 Patients with HPPD received in an open label design tolcapone (200 mg/day), carbidopa (25 mg/daily), and levodopa (100mg/day). The treatment resulted in a medication effect size of 0.2
Table 2: Case reports on HPPD treatment.