AROMA 303

Aromatherapy II Online

Overview

AROMA 303 Aromatherapy II prepares students for professional aromatherapy applications through a thorough exploration of essential oil materia medica and practice developing evidence-based aromatherapy support plans. This course also examines toxicology issues related to essential oils and aromatherapy, discussing important safety concerns, and best practices for working with low therapeutic margin essential oils. Student practice creating essential oil blend formulas, creating and using aromatherapy preparations, and analyzing the therapeutic properties of these formulas. Students practice researching an aromatherapy topic and communicating information found in aromatherapy research. This class is highly informative and students leave with ready to apply aromatherapy knowledge and skills.

Learning Outcomes

  • Apply foundational and intermediate essential oil blending principles to create balanced, goal-directed aromatherapy formulations using appropriate application methods.

  • Document client wellness support plans using professional SOAP notes, integrating subjective and objective information into clear, ethical aromatherapy case reports.

  • Analyze body systems specific wellness needs to select aromatherapy strategies that align with those systems.

  • Evaluate essential oil chemistry and toxicology considerations to determine safe dilution ratios, application routes, and contraindications for diverse client scenarios.

  • Design and justify aromatherapy support plans using structured clinical reasoning that aligns therapeutic actions, body systems, and safety considerations.

  • Demonstrate working knowledge of essential oil materia medica covered in the course by accurately selecting, describing, and applying essential oils in appropriate wellness contexts.

Prerequisites

More details

 

Required Course Pack: 

  • ACHS eTextbook: Petersen, D. (2020). Aromatherapy Materia Medica: Essential Oil Monographs (20th ed). Portland, OR: American College of Healthcare Sciences.
    (Optional: Printed copy available for an additional fee)
  • ACHS eTextbook: Petersen, D. (2023). Aromatherapy and the Body Systems: A Therapeutic Guide. Portland, Or. American College of Healthcare Sciences
  • Online Materials and Library Resources (OMLR)
  • AROMA Case Study Companion Kit II

The AROMA Case Study Companion Kit II includes the following certified organic or sustainably wildcrafted essential oils: 

  • Anise Pimpinella anisum
  • Basil Ocimum basilicum ct. Linalool
  • Bay Laurus nobilis
  • Benzoin Resinoid Styrax tonkinensis
  • Bergamot Citrus aurantium var. bergamia
  • Black Pepper Piper nigrum 
  • Buddha Wood Eremophila mitchellii
  • Cajuput Melaleuca leucadendron 
  • Cardamom Elettaria cardamomumeo
  • Carrot Seed Daucus carota 
  • Cedarwood Atlas Cedrus atlantica 
  • Cedarwood Virginia Juniperus virginiana 
  • Chamomile Roman Chamaemelum nobile
  • Cinnamon Cinnamomum zeylanicum 
  • Cistus Cistus ladaniferus 
  • Clary Sage Salvia sclarea
  • Clove Bud Syzygium aromaticum 
  • Coriander Coriandrum sativum 
  • Cypress Cupressus sempervirens 
  • Elemi Canarium luzonicum 
  • Eucalyptus Eucalyptus globulus
  • Fennel Sweet Foeniculum vulgare var. 
  • Fir Needle Abies balsamea 
  • Garlic Allium sativum 
  • Geranium Pelargonium graveolens
  • Ginger Zingibere officinale
  • Grapefruit Citrus paradisi
  • Immortelle Helichrysum italicum ct. neryl acetate
  • Lavender Lavandula angustifolia
  • Lemongrass Cymbopogon flexuosus
  • Nutmeg Myristica fragrans
  • Rose Attar Rosa damascena
  • Sandalwood Santalum album
  • White Sage Salvia apiana var. typica

This kit also contains the following experiential learning supplies: 

  • 1 oz Amber bottles (Qty 4)
  • 2 oz Amber bottle with cap (Qty 2)
  • 2 oz Cobalt blue spray bottle (Qty 2)
  • 5 ml Amber bottles (Qty 4)
  • 25 ml Beaker
  • 16 oz Organic Sweet Almond Oil (may contain multiple bottles to total 16oz)
  • 2 oz Apricot Kernel Oil
  • 2 oz Organic Camellia Oil
  • 2 oz Organic Jojoba Oil
  • 1/2 oz White Clay
  • 10 ml Roll-on Bottles (Qty 3)
  • 1 oz Benzoin Powder Styrax benzoin
  • Bath Salts: 2 oz Coarse Mineral Bath Salts, 4 oz Epsom Salts
  • 2 oz Cobalt Blue Bottle (Qty 2)
  • Nasal Inhaler
  • Perfume Test Strips Booklet
  • Aromatherapy Chart

Required Textbooks:

View the required textbooks for this class, including ISBN, edition, and retail price, by visiting our Required Textbooks page.

Total Course Price:

View the total course price, including tuition, fees, course materials, and shipping online here.

Required Textbooks:

View the required textbooks for this class, including ISBN, edition, and retail price, by visiting our Required Textbooks page.

Total Course Price:

View the total course price, including tuition, fees, course materials, and shipping online here.

 

Last updated 10/16/2025

Current Instructors:

View all ACHS instructors, including bios, photos, and courses taught.

Admissions Requirements:

Minimum of a high school diploma or equivalency and recommendation for admission by the ACHS Admissions Committee.

Total Course Price:

View the total course price including tuition, fees, course materials, and shipping.

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