Skip to main content

TL;DR

Dosage Calculations: D/H × Q formula, weight-based dosing (mg/kg), and metric/household/apothecary conversions.

By Valenke Exam Prep Team·Last updated 2026-06-02

Dosage Calculations

MEDICAL ASSISTANTPTCBNREMT PARAMEDIC

Definition

D/H × Q formula, weight-based dosing (mg/kg), and metric/household/apothecary conversions.

Equipment & Tools

D/H × Q formula, weight-based dosing (mg/kg), and metric/household/apothecary conversions. Tested on MA, PTCB, and Paramedic exams.

Clinical connection: Pulse technique involves Radial (most common), count 60 sec if irregular. Apical: left MCL, 5th ICS, count 60 sec. Pulse defi.

Practical Example

Clinical Procedure: Temperature measurement is relevant to dosage calculations.

Technique: Oral (under tongue, lips closed, 3-5 min), tympanic (pull ear up and back for adults), temporal (across forehead)

Normal values: Oral: 97.8-99.1 F. Rectal: +1 F. Axillary: -1 F. Tympanic: close to core.

Patient Communication

Patient education about dosage calculations should use simple language (6th-grade reading level). Verify understanding with teach-back: ask the patient to explain in their own words what was discussed. Provide written instructions to reinforce verbal education. Address cultural and language barriers using certified interpreters, not family members, for medical discussions.

Related Procedures

Related clinical procedures include phlebotomy. Order of draw for vacuum tubes:

  1. Gray (sodium fluoride for glucose)
  2. Gold/SST (serum separator)
  3. Lavender (EDTA for hematology/CBC)
  4. Blood culture (yellow SPS)
  5. Red (no additive for serum)

Preferred venipuncture site: Median cubital vein (first choice).

Why It Matters

Tested on MA, PTCB, and Paramedic exams.

Related Terms

Pharmacology (Medical Assistant)Pharmacology (Paramedic)Pharmacy Calculations

Practice This Topic

Practice ma pharm dosage → MEDICAL ASSISTANTPractice ptcb oe calculations → PTCBPractice para pharm dosing → NREMT PARAMEDIC

Ready to practice for the MEDICAL ASSISTANT?

Adaptive practice powered by Item Response Theory targets your weak areas. Start with 3 free sessions.

Start free practice →

Frequently Asked Questions

What injection technique applies to dosage calculations?▼
For dosage calculations: Subcutaneous: angle 45 degrees (or 90 with short needle/obese), sites: Upper arm (posterior), Abdomen (2 inches from umbilicus), Anterior thigh. Max volume: 0.5-1.0 mL. Needle: 25-27G, 5/8 inch.
What vital sign procedure relates to dosage calculations?▼
For dosage calculations: Pulse: Radial (most common), count 60 sec if irregular. Apical: left MCL, 5th ICS, count 60 sec. Pulse deficit: apical minus radial.. Normal: Normal adult: 60-100 bpm. Tachycardia over 100, bradycardia under 60..
What lab values are associated with dosage calculations?▼
For dosage calculations: Urinalysis: pH: 4.5-8.0; Specific gravity: 1.005-1.030; Protein: negative.