Dronabinol Is a Prescription Synthetic THC Used to Treat Appetite Loss and Chemotherapy-Induced Nausea

Dronabinol is a synthetic form of delta-9-tetrahydrocannabinol (THC) — the same psychoactive compound found in cannabis — manufactured as a prescription medication. If your doctor has mentioned Dronabinol, Marinol, or "synthetic THC capsules," this guide covers everything you need to know: what it's used for, how it works, how to take it, who shouldn't use it, and what it costs in 2026.

What Is Dronabinol?

Dronabinol is the generic name for a medication that's chemically identical to THC but made in a lab rather than extracted from the cannabis plant. It belongs to the cannabinoid drug class and works as both an antiemetic (anti-nausea) and an appetite stimulant.

Here are the key details:

• Brand names: Marinol, Syndros (discontinued)
• Drug class: Cannabinoid / Antiemetic / Appetite Stimulant
• Manufacturers: AbbVie (Marinol); generic manufacturers include Camber Pharmaceuticals and Par Pharmaceutical
• FDA approval: Approved for HIV/AIDS-related anorexia with weight loss and chemotherapy-induced nausea and vomiting (CINV)
• Controlled substance: Yes — Schedule III for Marinol capsules
• Generic available: Yes

The oral solution form (Syndros, 5 mg/mL) was classified as Schedule II and has been discontinued from the market, though the FDA confirmed this was not due to safety or effectiveness concerns.

What Is Dronabinol Used For?

FDA-Approved Uses

1. HIV/AIDS-related anorexia with weight loss — Dronabinol stimulates appetite in patients with AIDS who are losing weight and have no desire to eat. It helps patients maintain or gain weight.
2. Chemotherapy-induced nausea and vomiting (CINV) — specifically for patients who haven't responded to first-line antiemetics like Ondansetron (Zofran). Dronabinol is considered a second-line or add-on treatment.

Off-Label Uses

Some doctors prescribe Dronabinol for conditions not listed on its FDA label, including:

• Obstructive sleep apnea (limited evidence from Phase II trials)
• Chronic pain (some evidence versus placebo, but research is ongoing)
• PTSD-related insomnia
• Severe nausea unrelated to chemotherapy

Off-label prescribing is legal and common in medicine, but it means the evidence may be less robust than for approved uses.

How Is Dronabinol Taken?

Dronabinol comes as soft gelatin capsules in three strengths: 2.5 mg, 5 mg, and 10 mg. The capsules contain sesame oil.

For Appetite Stimulation (HIV/AIDS)

• Starting dose: 2.5 mg twice daily, taken 1 hour before lunch and dinner
• Can be gradually increased to a maximum of 10 mg twice daily (20 mg/day)
• Elderly patients may start at 2.5 mg once daily to reduce side effects

For Chemotherapy Nausea

• Starting dose: 5 mg taken 1–3 hours before chemotherapy
• Then 5 mg every 2–4 hours for a total of 4–6 doses per day
• Maximum: 15 mg per dose

Important tips:

• Swallow capsules whole — do not chew or crush them
• The first dose should be taken on an empty stomach
• High-fat meals may increase absorption, which can intensify effects
• Avoid alcohol completely — it adds to Dronabinol's sedating effects

For details on how Dronabinol works in your body, see: How Does Dronabinol Work? Mechanism of Action Explained

Who Should Not Take Dronabinol?

Dronabinol is not safe for everyone. You should not take it if you have:

• An allergy to Dronabinol, THC, or sesame oil — the capsules are formulated in sesame oil, which can cause serious allergic reactions in sensitive individuals
• A history of severe psychiatric illness — Dronabinol can worsen depression, mania, and psychotic disorders. If you have a history of schizophrenia or bipolar disorder, your doctor needs to carefully weigh the risks.

Use with caution if you have:

• Heart conditions (Dronabinol can cause blood pressure changes and rapid heart rate)
• Liver problems (the drug is metabolized by CYP2C9 and CYP3A4 in the liver)
• A history of substance abuse (Dronabinol has abuse potential as a THC-containing product)
• Are elderly (increased sensitivity to CNS effects)

Dronabinol is not recommended for pediatric patients.

For a full list of drug interactions, read: Dronabinol Drug Interactions: What to Avoid

How Much Does Dronabinol Cost?

Cost varies significantly depending on whether you have insurance and which form you're taking:

• Without insurance (retail): $250 to $900+ per month, depending on dose and quantity
• With a GoodRx coupon: Generic Dronabinol 2.5 mg (60 capsules) is approximately $68–$83
• With insurance: Most plans cover generic Dronabinol, though prior authorization is commonly required. Many plans also require step therapy (trying other antiemetics first for CINV).
• Medicare Part D: Generally covers generic Dronabinol

If cost is a barrier, there are options:

• Prescription Hope offers access to Dronabinol for approximately $50–$70 per month
• State AIDS Drug Assistance Programs (ADAPs) may cover Dronabinol for HIV patients
• NeedyMeds and RxAssist list additional patient assistance resources

For a complete guide to saving money, see: How to Save Money on Dronabinol

Final Thoughts

Dronabinol is a unique medication — a prescription-grade synthetic THC that can genuinely help patients who are struggling with appetite loss from HIV/AIDS or nausea from chemotherapy. But it's not without its complexities: it's a controlled substance with psychoactive effects, potential interactions, and variable cost.

The most important thing you can do is work closely with your doctor, understand what to expect from side effects, and know where to fill your prescription. If you're having trouble finding it, Medfinder can help you locate a pharmacy with Dronabinol in stock.