Product-specific references appear beside the claims in each review. This library collects 68 sources used across the publication. Scientific study entries identify when only the indexed abstract was examined.
Read the underlying material
Sources & evidence notes
Provider documents support product and commercial details. Clinical references have their own study or labeling limits. Accessed October 7, 2026; indexed abstracts were used for the listed studies.
- CoreAge Rx: 4Play product information
Provider source; product description and advertised price
- FDA: Compounding and the FDA — questions and answers
Government guidance on compounded medications
- DailyMed: Tadalafil prescribing information, including section 5.11
Prescribing label; not evidence for the 4Play combination
- MedlinePlus: Sildenafil
Drug information; standard sildenafil products
- MedlinePlus: Tadalafil
Drug information; standard tadalafil products
- MedlinePlus: Vardenafil
Government patient drug information; standard products, not compounded equivalents
- Dula et al. (2001): sublingual apomorphine crossover trial
Primary randomized trial; single-ingredient apomorphine, abstract reviewed via NCBI
- Cui et al. (2015): daily tadalafil with as-needed sildenafil
Primary clinical study; 180 patients, specific regimen, abstract reviewed via NCBI
- NIDDK: Diagnosis of erectile dysfunction
Government patient information
- Ro: ED product catalog and plan quantities
Provider catalog; individual products, strengths and plan prices
- Ro: terms of use, payments and subscriptions
Provider policy; distinguish general subscription terms from Ro Body terms
- Ro Support: canceling an order
Provider support; processing orders and future shipments
- Ro Support: return and refund policy
Provider support; prescription return and refund restrictions
- Ro Support: changing your prescription
Provider support; clinical changes and follow-up
- EAU: Management of erectile dysfunction
Specialty guideline; clinical evaluation, treatment, and limited combination evidence
- Ro: medication pricing
Provider source; advertised plan prices and quantities
- Ro: Sparks product details
Provider source; compounded formula, subscription pricing, and care process
- Ro: Daily Rise Gummies
Provider source; compounded tadalafil and billing intervals
- Hims: current ED treatment catalog
Provider catalog; individual named offers and starting prices
- Hims: Hard Mints formulation safety library
Provider formulation document; includes options not confirmed in the main catalog
- Hims Support: canceling a subscription
Provider policy; 48-hour notice and orders already processing
- Hims Support: refund policy
Provider policy; no guaranteed refund after pharmacy processing
- Hims Support: when billing occurs
Provider policy; next order date, charge timing, and subscription intervals
- Hims Support: changing the next order date
Provider support; refill rescheduling differs from cancellation
- Hims: Hard Mints chewable ED medicines
Provider source; compounded formulations and advertised starting prices
- Hims: 3-in-1 Pill formulation and safety
Provider formulation document; sildenafil, tadalafil and vitamin B12
- Hims: Tadalafil Chews safety information
Provider formulation document; single-ingredient compounded tadalafil
- Hims: Sex Rx + Hair Health formulations
Provider formulation document; versions with and without finasteride
- MedlinePlus: Oral minoxidil
Government patient drug information; systemic cardiovascular warnings
- Hims: Sex Rx + Testosterone Support formula
Provider formulation document; tadalafil and supplement blend, not testosterone replacement
- NIH Office of Dietary Supplements: Zinc
Government nutrient information; intake limits and interactions
- Hims: Sex Rx + Multivitamin formula
Provider formulation document; tadalafil and listed nutrients
- Hims: Climax Control and other product formulations
Provider article; tadalafil and fluoxetine identification, not an independent comparison
- MedlinePlus: Fluoxetine
Government patient drug information; antidepressant warnings and interactions
- Hims: Sex Rx + Vitality Pro formula
Provider formulation document; tadalafil and atorvastatin
- MedlinePlus: Atorvastatin
Government patient drug information; statin use, monitoring and adverse effects
- Hims: generic sildenafil
Provider source; standard tablets and advertised starting price
- Hims: generic tadalafil tablets
Provider product page; daily and as-needed tablet options
- Hims: branded Viagra
Provider product page; brand-name sildenafil and advertised price
- Hims: branded Cialis
Provider product page; branded tadalafil, distinct from generics
- BlueChew: platform, care process, and safety information
Provider source; current featured product and service description
- BlueChew: GOLD product and plan information
Provider source; four-ingredient compounded formulation
- FDA: Locate a state-licensed online pharmacy
Government pharmacy verification resource
- BlueChew: GOLD published cost breakdown
Provider marketing article; approximate price examples, not a checkout quote
- BlueChew: account and subscription questions
Provider policy; plan changes, one-order skips, and indefinite holds
- BlueChew: shipping and delivery questions
Provider policy; destination availability, shipping, and renewal terms
- BlueChew: returns and refunds policy
Provider policy; prescription returns and 24-hour cancellation notice
- Behnia et al. (2014): intranasal oxytocin in couples
Primary study; 29 healthy couples, different route and population from GOLD, abstract reviewed via NCBI
- BlueChew: product-specific approximate costs
Provider price examples; approximate and not necessarily consistent with other offer pages
- BlueChew: combination and single-ingredient formulas
Provider article; listed strengths and formulations, not independent comparative evidence
- BlueChew: product access and legacy-plan notice
Provider article; restricts certain products to existing enrolled customers; confirm account eligibility
- BlueChew: VMAX product information
Provider product page; vardenafil and tadalafil strengths
- BlueChew: named product lineup
Provider article; product identification and marketing claims
- Rugiet: Ready product information
Provider source; current compounded product and consultation process
- Rugiet: Ready ingredients explained
Provider source; sildenafil, tadalafil, and apomorphine formulation
- Rugiet Support: membership options and inclusions
Provider support; plan intervals, shipping, and consultation fees
- Rugiet: terms and conditions
Provider policy; 72-hour subscription cancellation notice and refund eligibility
- Rugiet Support: canceling an order or subscription
Provider support; member portal steps and processing restrictions
- Rugiet Support: treatment response and refunds
Provider policy; refund exclusions and 24-hour order-change notice
- Pavone et al. (2004): apomorphine versus sildenafil
Primary crossover study; 34 evaluable participants, abstract reviewed via NCBI
- Rugiet: Daily Boost product information
Provider product page; tadalafil and DHEA combination
- Reiter et al. (1999): DHEA and erectile dysfunction
Primary placebo-controlled study, 40 selected men; indexed abstract reviewed
- Morales et al. (2009): androgens and sexual function
Primary randomized study, 86 men; indexed abstract reviewed; no significant sexual-function benefit
- Panchaprateep and Lueangarun (2020): oral minoxidil in 30 men
Primary open-label single-arm study, 24 weeks; indexed abstract reviewed, not a trial of a tadalafil combination
- Rugiet: Grower product information
Provider product page; tadalafil and oral minoxidil combination
- FDA: Generic drug facts
Government information on approved generic medicines
- NIDDK: Symptoms & causes of erectile dysfunction
Government patient information
- NIDDK: Treatment for erectile dysfunction
Government patient information